Papers by Xin Guo

42 papers
Fusion meets Function: The Adaptive Selection-Generation Approach in Event Argument Extraction (2025.coling-main)

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Challenge: Event Argument Extraction is a critical subtask of Event Extraction, focused on identifying event arguments within text.
Approach: They propose a Fusion Selection-Generation-Based Approach that merges selective and generative methods to enhance argument extraction accuracy.
Outcome: The proposed method improves on the RAMS and WikiEvents, while preserving the unique characteristics of both methods.
Scaling Laws for Code: Every Programming Language Matters (2026.findings-acl)

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Challenge: Existing studies focus on language-agnostic settings, neglecting the inherently multilingual nature of modern software development.
Approach: They propose a proportion-dependent scaling law that prioritizes high-utility languages . they propose PLs to have varying effects during pre-training that affect model performance .
Outcome: The proposed scaling law is based on 1000+ experiments across multiple languages and models.
The Elephant in the Room: Exploring the Role of Neutral Words in Language Model Group-Agnostic Debiasing (2025.findings-acl)

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Challenge: Large Language Models (LLMs) are increasingly integrated into our daily lives, raising ethical concerns, especially about perpetuating stereotypes.
Approach: They propose a method that incorporates a neutral word semantics-based loss function to alleviate the deterioration of the LMS during debiasing.
Outcome: The proposed method alleviates the deterioration of the Language Modeling Score (LMS) by incorporating a neutral word semantics-based loss function.
Self-Supervised Learning for Contextualized Extractive Summarization (P19-1)

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Challenge: Existing models for extractive summarization are usually trained from scratch with a cross-entropy loss . previous work builds an end-to-end system to learn to choose sentences without explicitly modeling document context .
Approach: They propose three auxiliary pre-training tasks that learn to capture the document context in a self-supervised fashion.
Outcome: The proposed models outperform existing models on a CNN/DM dataset.
MTSQL-R1: Towards Long-Horizon Multi-Turn Text-to-SQL via Agentic Training (2026.acl-long)

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Challenge: Existing systems for multi-turn Text-to-SQL are limited to a short-horizon paradigm, generating a query per turn without execution, explicit verification, and refinement, which leads to non-executable or incoherent outputs.
Approach: They propose to train an agentic training framework for long-horizon multi-turn Text-to-SQL that uses a Markov Decision Process to generate a query per turn without execution, explicit verification, and refinement.
Outcome: Experiments on CoSQL and SParC show that MTSQL-R1 consistently outperforms strong baselines, highlighting the importance of environment-driven verification and memory-guided refinement for conversational semantic parsing.
AgentGym2: Benchmarking Large Language Model Agents in De-Idealized Real-World Environments (2026.acl-long)

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Challenge: Existing benchmarks evaluate agents in simplified, idealized settings, relying on pre-packaged tool interfaces, overlooking critical steps, and assume inputs are clean and fully specified.
Approach: They propose a framework that evaluates language agents in simplified, idealized settings . they show that even SOTA systems like Gemini and GPT-5 struggle on AgentGym2 .
Outcome: Experiments on 15 proprietary and open-source models show that even SOTA systems like Gemini and GPT-5 struggle on AgentGym2 .
Continual Learning Long Short Term Memory (2020.findings-emnlp)

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Challenge: Existing approaches to prevent catastrophic forgetting in neural networks are based on the stability-plasticity dilemma, but only a limited size of old data is available.
Approach: They propose a Continual Learning Long Short Term Memory cell in Recurrent Neural Network (RNN) that considers the state of each individual task's output gates and the correlation of the states between tasks.
Outcome: The proposed method significantly improves on spoken language understanding tasks over state-of-the-art approaches.
SURE: Mutually Visible Objects and Self-generated Candidate Labels For Relation Extraction (2025.coling-main)

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Challenge: Joint relation extraction models face high computational complexity, complex network architectures, difficult parameter tuning and limited interpretability.
Approach: They develop a candidate label marker mechanism that prioritizes strategic label selection over simple label generation.
Outcome: The proposed candidate label marks improve the SOTA methods by 2.5%, 1.9%, 1.2% . the proposed candidate labels improve the performance of the proposed methods .
ZipVoice-Dialog: Non-Autoregressive Spoken Dialogue Generation with Flow Matching (2026.findings-acl)

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Challenge: Existing autoregressive models for dialogue generation suffer from high latency and stability issues.
Approach: They propose a non-autoregressive (NAR) zero-shot spoken dialogue generation model based on flow-matching.
Outcome: The proposed model outperforms existing models in speech generation due to poor speech intelligibility and turn-taking precision.
LiveCANNBench: Benchmark SWE AI Coding for Ascend CANN (2026.findings-acl)

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Challenge: Recent advances in agents have enabled multi-file, multi-language, and dependency-aware AI coding.
Approach: They propose an SWE-level benchmark for AI coding in the Huawei Ascend CANN software stack.
Outcome: The proposed benchmark is constructed from real-world CANN repositories and consists of over 400 task instances spanning multiple file, multi-language, and execution-aware coding challenges.
AQE: Argument Quadruplet Extraction via a Quad-Tagging Augmented Generative Approach (2023.findings-acl)

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Challenge: Argument mining involves multiple subtasks, but each one is insufficient for understanding argumentative structure and reasoning process.
Approach: They propose a quadruplet extraction task that extracts four argumentative components . they use a generative quadragging module to augment the training of the generative framework .
Outcome: The proposed method can extract arguments from a large-scale dataset.
Chain of Ideas: Revolutionizing Research Via Novel Idea Development with LLM Agents (2025.findings-emnlp)

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Challenge: Existing methods for idea generation either trivially prompt LLMs or expose LLM to extensive literature without indicating useful information.
Approach: They propose a chain-of-ideas agent that organizes literature in a chains structure . they propose evaluating idea-generation methods from different perspectives .
Outcome: The proposed agent outperforms existing methods and matches human quality in idea generation.
LLMs Trust Humans More, That’s a Problem! Unveiling and Mitigating the Authority Bias in Retrieval-Augmented Generation (2025.acl-long)

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Challenge: Large language models (LLMs) generate outputs that stray from user input or contravene established knowledge.
Approach: They propose a new phenomenon, Authority Bias, where LLMs favor one knowledge source over the other . they propose atomic information that generates conflicts and a Conflict Detection Enhanced Query framework .
Outcome: The proposed framework reduces Authority bias in large language models . it detects conflicts, performs credibility assessment on conflicting paragraphs, and detects perturbed text .
When Inverse Data Outperforms: Exploring the Pitfalls of Mixed Data in Multi-Stage Fine-Tuning (2025.findings-emnlp)

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Challenge: Existing methods for o1-level performance focus on unidirectional supervised fine-tuning (SFT), overlooking the intricate interplay between diverse reasoning patterns.
Approach: They construct a reverse reasoning dataset and examine how it is supervised . they find that naively mixing forward and reverse data during SFT weakens the directional distinction .
Outcome: The proposed model improves accuracy by 1.6%–6.8% over a standard model.
Dependency Position Encoding for Relation Extraction (2022.findings-naacl)

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Challenge: Existing methods to extract relation extraction from sentence are limited in focusing on leveraging dependency information.
Approach: They propose dependency position encoding (DPE) that incorporates dependency connections and dependency types into the self-attention mechanism to distinguish the importance of different word dependencies.
Outcome: The proposed method significantly outperforms the previous methods on SemEval 2010 Task 8, KBP37, and TACRED.
Unveiling and Consulting Core Experts in Retrieval-Augmented MoE-based LLMs (2024.emnlp-main)

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Challenge: Existing research seeks to enhance RAG performance by retrieving higher-quality documents or designing RAG-specific LLMs, but internal mechanisms that contribute to RAG’s effectiveness remain underexplored.
Approach: They propose to examine the internal mechanisms within the popular Mixture-of-Expert (MoE)-based LLMs and examine their ability to improve RAG by examining expert activations.
Outcome: The proposed method significantly improved the ability of Large Language Models (LLMs) to solve knowledge-intensive tasks.
Counteracting the Matthew Effect in Self-Improvement of LVLMs through Head-Tail Re-balancing (2026.acl-long)

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Challenge: Large vision language models have impressive reasoning capabilities across complex multimodal tasks.
Approach: They propose to use distribution-reshaping and trajectory-rebalancing to improve visual reasoning capabilities.
Outcome: Experiments on Qwen2-VL-7B-Instruct and InternVL2.5-4B models show that their methods outperform baselines by 3.86 points.
AgentGym: Evaluating and Training Large Language Model-based Agents across Diverse Environments (2025.acl-long)

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Challenge: Large language models (LLMs) are promising foundations to build generally-capable agents . however, the community lacks a unified interactive framework that covers diverse environments for comprehensive evaluation of agents.
Approach: They propose a framework that features 7 real-world scenarios, 14 environments, and 89 tasks for unified, real-time, and concurrent agent interaction.
Outcome: The proposed framework features 7 real-world scenarios, 14 environments, and 89 tasks for unified, real-time, and concurrent agent interaction.
PRIM: Towards Practical In-Image Multilingual Machine Translation (2025.emnlp-main)

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Challenge: Current research on in-image machine translation focuses on synthetic data with simple background, single font, fixed text position, and bilingual translation.
Approach: They propose an end-to-end model to handle the challenge of practical conditions in PRIM . they annotate a real-world one-line text image with complex background, fonts, diverse text positions .
Outcome: The proposed model improves translation quality and visual effect compared to other models.
Compete to Complete: Co-opetition Adversarial Learning for Retrieval-Augmented Generation (2026.acl-long)

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Challenge: Existing approaches to reduce hallucination in large language models lack a robust mechanism for generating a generative model.
Approach: They propose a framework that formulates retriever–generator training in RAG as a minimax game.
Outcome: The proposed framework improves retrieval-augmented generation performance on seven benchmark datasets.
Adaptive Nearest Neighbor Machine Translation (2021.acl-short)

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Challenge: kNN-MT uses pre-trained NMT model with token-level k-nearest-neighbor retrieval to improve translation accuracy.
Approach: They propose a method that combines a pre-trained NMT model with token-level k-nearest-neighbor retrieval to improve translation accuracy.
Outcome: The proposed method outperforms the existing model on four benchmark datasets and is open-source.
FreeTransfer-X: Safe and Label-Free Cross-Lingual Transfer from Off-the-Shelf Models (2022.findings-naacl)

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Challenge: Existing work on cross-lingual transfer has not studied how to leverage knowledge of rich-resource languages without labels.
Approach: They propose a 2-step knowledge distillation framework to achieve knowledge transfer from off-the-shelf models in rich-resource languages.
Outcome: The proposed method reduces annotation cost and protects private labels.
DGPO: Beyond Pairwise Preferences with Directional Consistent Groupwise Optimization (2026.findings-acl)

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Challenge: Existing methods for directional consistency alignment of large language models are limited . a recent study suggests reverse supervision as a complement to forward reasoning .
Approach: They propose a framework that aggregates supervision signals at the group level and explicitly models direction-aware alignment through multi-candidate comparisons.
Outcome: The proposed framework achieves 3.2% accuracy improvement across five benchmarks and multiple datasets.
Support or Refute: Analyzing the Stance of Evidence to Detect Out-of-Context Mis- and Disinformation (2023.emnlp-main)

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Challenge: Mis- and disinformation online are a major source of harms of different kinds . out-of-context information is where different pieces of information are falsely associated . past studies have attempted to defend against OOC mis- and deinformation through external evidence, but they disregard the role of different pieces with different stances.
Approach: They propose a stance extraction network that can extract stances of different pieces of evidence in a single framework.
Outcome: The proposed model outperforms the state-of-the-art models on a public large-scale dataset with a performance gain of 3.2% in accuracy.
PLATO-XL: Exploring the Large-scale Pre-training of Dialogue Generation (2022.findings-aacl)

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Challenge: Experimental results show PLATO-XL achieves state-of-the-art results across multiple conversational tasks.
Approach: They propose to train PLATO-XL models with up to 11 billion parameters, trained on Chinese and English social media conversations.
Outcome: The proposed model achieves state-of-the-art on multiple conversational tasks, verifying its potential as a foundation model of conversational AI.
Can LLMs Hear the Dogwhistle? (2026.findings-acl)

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Challenge: Existing safety benchmarks focus on explicitly harmful content, but ignore context-dependent expressions such as dogwhistles.
Approach: They propose a benchmark for evaluating LLM safety under dogwhistle-driven prompts . their findings expose a blind spot in current safety evaluation practices .
Outcome: The proposed benchmark compared safety performance with toxic terms using dogwhistle-driven prompts.
Sailor: Open Language Models for South-East Asia (2024.emnlp-demo)

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Challenge: Large language models (LLMs) rely on English data for training, but are often not comparable across other languages.
Approach: They propose to develop a family of open language models for SEA languages . they use BPE dropout, aggressive data cleaning and deduplication to improve model robustness .
Outcome: The proposed models perform well across four benchmarks, including commonsense reasoning, question answering, reading comprehension and examination.
RGL: A Simple yet Effective Relation Graph Augmented Prompt-based Tuning Approach for Few-Shot Learning (2022.findings-naacl)

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Challenge: Pre-trained language models (PLMs) are a good starting point for downstream applications, but it is difficult to generalize them to new tasks given a few labeled samples.
Approach: They propose to use Relation Graph augmented learning to improve the performance of few-shot natural language understanding tasks by rewriting the input sequence into a cloze question with masks.
Outcome: Extensive experiments show that Relation Graph augmented learning (RGL) improves performance of prompt-based tuning strategies.
FOCUS: A Fine-Grained Customer-Oriented Sentiment Dialogue Summarization Dataset for Chinese Customer Service (2026.findings-acl)

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Challenge: Existing studies largely overlook fine-grained sentiment dynamics expressed by customers . current methods often exhibit misalignment between aspects and sentiments .
Approach: They propose a three-stage approach to building an aspect-aware sentiment dataset . they use a fine-grained customer-oriented Chinese dialogUe summarization dataset based on this scheme .
Outcome: The proposed model improves faithfulness and interpretability of the proposed dataset.
FEA-Bench: A Benchmark for Evaluating Repository-Level Code Generation for Feature Implementation (2025.acl-long)

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Challenge: Existing benchmarks focus on standalone programming problems, such as HumanEval, MBPP, and LiveCodeBench.
Approach: They propose to use large language models to evaluate their ability to perform incremental development within code repositories by collecting pull requests from 83 GitHub repositorias and using rule-based and intent-based filtering to construct task instances focused on new feature development.
Outcome: The proposed benchmarks show that large language models perform significantly worse in the FEA-Bench, highlighting considerable challenges in repository-level incremental code development.
HyperPELT: Unified Parameter-Efficient Language Model Tuning for Both Language and Vision-and-Language Tasks (2023.findings-acl)

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Challenge: Pretraining and fine-tuning are the dominant paradigms in natural language processing.
Approach: They propose a parameter-efficient multitask learning framework that takes trainable hyper-embeddings and visual modality as input and outputs weights for different modules in a pretrained language model.
Outcome: The proposed framework adds fewer trainable parameters in multi-task learning while achieving superior performances and transfer ability compared to state-of-the-art methods.
World to Code: Multi-modal Data Generation via Self-Instructed Compositional Captioning and Filtering (2024.emnlp-main)

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Challenge: Recent advances in Vision-Language Models and the scarcity of high-quality multi-modal alignment data have inspired numerous researches on synthetic VLM data generation.
Approach: They propose a multi-modal data construction pipeline that organizes the final output into a Python code format.
Outcome: The proposed pipeline improves visual question answering and visual grounding benchmarks across different VLMs.
From Objectives to Questions: A Planning-based Framework for Educational Mathematical Question Generation (2025.acl-long)

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Challenge: Traditional generation methods focus primarily on textual quality, but they fail to meet complex, multifaceted educational requirements.
Approach: They propose a method for automatic generating high-quality mathematical problems that align with educational objectives using a dataset of 16k mathematical questions with multi-dimensional educational objectives.
Outcome: The proposed method improves generating high-quality mathematical questions that meet multi-dimensional educational objectives.
JurisBench: A Deep Benchmark for Assessing Large Language Models in Professional Legal Practice (2026.acl-long)

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Challenge: Existing legal benchmarks evaluate isolated tasks or exam-style questions, failing to capture the procedural interdependencies and adjudicative rigor inherent in professional practice.
Approach: They propose a vertical, depth-oriented, domain-specific benchmark to evaluate Large Language Models (LLMs) in Chinese civil litigation.
Outcome: The proposed benchmarks show that large language models exhibit an "illusion of competence" the results highlight a critical gap between fluent linguistic output and judicial reliability .
Advancing Abductive Reasoning in Knowledge Graphs through Complex Logical Hypothesis Generation (2024.acl-long)

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Challenge: Abductive reasoning is the process of making educated guesses to provide explanations for observations.
Approach: They propose a task of complex logical hypothesis generation to generate a complex logique hypothesis that can explain a set of observations.
Outcome: The proposed model generates logical hypotheses closer to the reference hypothesis, but not better on unseen observations.
VisFinEval: A Scenario-Driven Chinese Multimodal Benchmark for Holistic Financial Understanding (2025.emnlp-main)

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Challenge: Existing benchmarks focus on text comprehension, but MLLMs lack the ability to integrate visual data over financial visuals.
Approach: They evaluate 21 state-of-the-art multimodal large language models in a zero-shot setting . they use an annotated question–answer pair from eight common financial image modalities .
Outcome: The new benchmark outperforms existing models but trailed financial experts by 14 percentage points.
Aligning Agents via Planning: A Benchmark for Trajectory-Level Reward Modeling (2026.acl-long)

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Challenge: Large Language Models (LLMs) evolve into agentic systems capable of autonomous tool invocation and complex reasoning.
Approach: They propose a trajectory-level preference benchmark to evaluate judges' ability to distinguish preferred versus distractor agent trajectories in tool-integrated environments.
Outcome: The proposed benchmark evaluates how well judges distinguish preferred versus distractor agent trajectories in complex tool-using scenarios.
LLMBox: A Comprehensive Library for Large Language Models (2024.acl-demos)

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Challenge: a library to facilitate the development, use, and evaluation of large language models (LLMs) is presented.
Approach: They propose a unified library to facilitate the development, use and evaluation of large language models (LLMs).
Outcome: The proposed library is based on extensive experiments in a variety of evaluation settings.
FinEval: A Chinese Financial Domain Knowledge Evaluation Benchmark for Large Language Models (2025.naacl-long)

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Challenge: Large language models have demonstrated outstanding performance in various natural language processing tasks, but their security capabilities in the financial domain have not been explored.
Approach: They propose to use a benchmark to evaluate large language models' financial domain knowledge and practical abilities.
Outcome: The proposed benchmark evaluates large language models' financial domain knowledge and practical abilities.
PrivLM-Bench: A Multi-level Privacy Evaluation Benchmark for Language Models (2024.acl-long)

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Challenge: generative large language models (LLMs) exhibit surprising capability and integrate previous tasks into a unified text generation formulation.
Approach: They propose a privacy evaluation benchmark to quantify the privacy leakage of language models.
Outcome: The proposed benchmark compares PPLMs with different privacy implementations to find out how privacy leakage is handled.
An Empirical Analysis on Spatial Reasoning Capabilities of Large Multimodal Models (2024.emnlp-main)

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Challenge: Large Multimodal Models (LMMs) have shown impressive generalization ability on vision and language tasks, but their spatial understanding is under-explored.
Approach: They construct a VQA dataset to analyze LMMs' spatial reasoning capabilities.
Outcome: The proposed model is stronger at basic object detection than complex spatial reasoning.
Transform Retrieval for Textual Entailment in RAG (2025.naacl-short)

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Challenge: Existing retrieval methods prioritize relevance without ensuring the retrieved documents semantically support answering the queries.
Approach: They propose a novel approach to improve Textual Entailment Retrieval within the framework of Retri-Augmented Generation (RAG) they transform query embeddings to better align with semantic entailment without re-encoding the document corpus.
Outcome: The proposed approach consistently approaches the skyline across multiple datasets, demonstrating its strength in many-to-many retrieval scenarios.

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