A Chunk-based Chain of Thought Prompting Method for Mitigating Over-Correction in Chinese Grammatical Error Correction

Xinquan Chang, Junguo Zhu


Abstract
"Large Language Models (LLMs) have demonstrated remarkable capabilities in semantic under-standing and text generation. However, when applied to downstream tasks such as Chinese Grammatical Error Correction (CGEC), they often suffer from over-correction issues, where grammatically correct parts are mistakenly altered. Moreover, some existing methods aim to address over-correction in Sequence-to-Sequence (Seq2Seq) models, they are difficult to adapt to decoder-only LLMs. To address these challenges, we propose a Chunk-based Chain ofThought (CoT) Prompting Method. Our study is structured into three key components. Initially, we identify specific types of grammatical errors in the input sentences. Following this,sentences are segmented into smaller chunks, and each chunk is analyzed to match the detected error types. Ultimately, the aggregated information guides LLMs in performing localized correction within the input sentences. The experimental results have proved the effectiveness of our method in mitigating over-correction, achieving higher F0.5 score while maintaining robust grammatical error correction performance. This method provides innovative perspectives on employing LLMs to enhance the precision and granularity of CGEC task."
Anthology ID:
2025.ccl-1.63
Volume:
Proceedings of the 24th China National Conference on Computational Linguistics (CCL 2025)
Month:
August
Year:
2025
Address:
Jinan, China
Editors:
Maosong Sun, Peiyong Duan, Zhiyuan Liu, Ruifeng Xu, Weiwei Sun
Venue:
CCL
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Publisher:
Chinese Information Processing Society of China
Note:
Pages:
831–841
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URL:
https://preview.aclanthology.org/ingest-ccl/2025.ccl-1.63/
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Cite (ACL):
Xinquan Chang and Junguo Zhu. 2025. A Chunk-based Chain of Thought Prompting Method for Mitigating Over-Correction in Chinese Grammatical Error Correction. In Proceedings of the 24th China National Conference on Computational Linguistics (CCL 2025), pages 831–841, Jinan, China. Chinese Information Processing Society of China.
Cite (Informal):
A Chunk-based Chain of Thought Prompting Method for Mitigating Over-Correction in Chinese Grammatical Error Correction (Chang & Zhu, CCL 2025)
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https://preview.aclanthology.org/ingest-ccl/2025.ccl-1.63.pdf