--- title: "Lang Cao · The University of Tokyo — author profile and papers" description: "Lang Cao, The University of Tokyo: 2 papers on Elamur Research (2026), h-index 10 — affiliations, topics, co-authors and who cites them in…" canonical: "https://research.elamur.ai/free/en/authors/lang-cao/" --- [Elamur Research](https://md.research.elamur.ai/free/en/) · [this page in HTML](https://research.elamur.ai/free/en/authors/lang-cao/) [home](https://md.research.elamur.ai/free/en/) / [authors](https://md.research.elamur.ai/free/en/authors/) / Lang Cao # Lang Cao Lang Cao has 2 papers in our library, in 2026, most of them on [Language models & pretraining](https://md.research.elamur.ai/free/en/topics/language-models/), [Reasoning](https://md.research.elamur.ai/free/en/topics/reasoning/); often with [Hanbing Liu](https://md.research.elamur.ai/free/en/authors/hanbing-liu/), [Dongmei Zhang](https://md.research.elamur.ai/free/en/authors/dongmei-zhang/), [Haoyu Dong](https://md.research.elamur.ai/free/en/authors/haoyu-dong/). 2 papers in our library · 2026 [OpenAlex](https://openalex.org/A5101897293) · [ORCID](https://orcid.org/0000-0003-3972-4025) · [**h-index 10**](https://openalex.org/authors/A5101897293) · [29 works](https://openalex.org/works?filter=author.id:A5101897293) · [374 citations](https://openalex.org/works?filter=author.id:A5101897293&sort=cited_by_count:desc) OpenAlex, 2026-10-14 [📄 2 works in our library](https://md.research.elamur.ai/free/en/authors/lang-cao/#papers) · [⭐ Paper Stars ranking: #11580](https://md.research.elamur.ai/free/en/paper-stars/page/116/#star-11580) The profile is the library's match of the name; two people with one name are not always told apart. Elsewhere: [Google Scholar](https://scholar.google.com/citations?view_op=search_authors&mauthors=Lang+Cao) · [Semantic Scholar](https://www.semanticscholar.org/search?q=Lang+Cao) · [dblp](https://dblp.org/search?q=Lang+Cao) · [ACL Anthology](https://aclanthology.org/search/?q=Lang+Cao) ## Affiliations [🎓**The University of Tokyo** Tokyo · Japan 2009–2026 · 10 papers*current*](https://md.research.elamur.ai/free/en/universities/the-university-of-tokyo/) · [🎓**Zhengzhou University** Zhengzhou · China 2016–2020 · 5 papers](https://md.research.elamur.ai/free/en/universities/zhengzhou-university/) · [🎓**Fudan University** Shanghai · China 2013–2014 · 4 papers](https://md.research.elamur.ai/free/en/universities/fudan-university/) · [🎓**Shanghai Jiao Tong University** Shanghai · China 2006–2008 · 4 papers](https://md.research.elamur.ai/free/en/universities/shanghai-jiao-tong-university/) From the bylines of their papers (OpenAlex, 2026-10-14), ORCID and Wikidata; institutions on papers are matched by machine. 2 more institutions on single bylines are not listed. ## Fields, topics and concepts Of its works in our library, with the number of works on each. 📚 Shelves 6 The field of science this work belongs to (OpenAlex fields).[Arts and Humanities · 2 works](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/) · [Computer Science · 2 works](https://md.research.elamur.ai/free/en/shelves/computer-science/) · [Artificial Intelligence · 2 works](https://md.research.elamur.ai/free/en/shelves/computer-science/artificial-intelligence/) · [Language and Linguistics · 2 works](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/language-and-linguistics/) · [Computer Vision and Pattern Recognition · 1 work](https://md.research.elamur.ai/free/en/shelves/computer-science/computer-vision-and-pattern-recognition/) · [Information Systems · 1 work](https://md.research.elamur.ai/free/en/shelves/computer-science/information-systems/) 🧭 Topics 2 Research subjects and languages the work is about.[Language models & pretraining · 2 works](https://md.research.elamur.ai/free/en/topics/language-models/) · [Reasoning · 1 work](https://md.research.elamur.ai/free/en/topics/reasoning/) ## Works by year ### 2020s [**2026** 2 papers](https://md.research.elamur.ai/free/en/authors/lang-cao/year/2026/) ## Papers The most cited first (OpenAlex and our library). 1. **[Not All Tokens Matter: Towards Efficient LLM Reasoning via Token Significance in Reinforcement Learning](https://md.research.elamur.ai/free/en/papers/liu-2026-not-all-tokens-matter-efficient/)** *(2026 · 1 citation)* Reasoning LLMs often generate chains of thought much longer than they need to be. Earlier RL methods for shortening them apply length penalties uniformly across tokens, which can hurt answer correctness. This paper treats the problem at the token level. It notes that a large share of CoT tokens barely influence the… 2. **[RAG or Learning? Understanding the Limits of LLM Adaptation under Continuous Knowledge Drift in the Real World](https://md.research.elamur.ai/free/en/papers/liu-2026-rag-or-learning-understanding-limits/)** *(2026)* LLMs learn facts at pretraining time, so they fall out of date as the world changes. They may also mix up older and newer states of the same fact, which the authors call continuous knowledge drift. Continual finetuning, knowledge editing and RAG have rarely been tested on realistic, chronologically ordered streams of… ## Co-authors here 7 co-authors with a page, the most papers together first. - [Hanbing Liu](https://md.research.elamur.ai/free/en/authors/hanbing-liu/) ×2 - [Dongmei Zhang](https://md.research.elamur.ai/free/en/authors/dongmei-zhang/) - [Haoyu Dong](https://md.research.elamur.ai/free/en/authors/haoyu-dong/) - [Mengyu Zhou](https://md.research.elamur.ai/free/en/authors/mengyu-zhou/) - [Shi Han](https://md.research.elamur.ai/free/en/authors/shi-han/) - [Yang Li](https://md.research.elamur.ai/free/en/authors/yang-li/) - [Yuanyi Ren](https://md.research.elamur.ai/free/en/authors/yuanyi-ren/) ## Venues Where their works here were published, the most works first, with the editions of those that have a page. - [Annual Meeting of the Association for Computational Linguistics (ACL)](https://md.research.elamur.ai/free/en/venues/acl/): [ACL 2026](https://md.research.elamur.ai/free/en/venues/acl/2026/) - [Findings of the Association for Computational Linguistics](https://md.research.elamur.ai/free/en/venues/findings/): [Findings of the Association for Computational Linguistics 2026](https://md.research.elamur.ai/free/en/venues/findings/2026/) Updated 1 November 2026