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title: Hi, I'm Chengcheng Han
subtitle: Researcher in Evaluation and Analysis of Large Language Models
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<br>
I recently completed my PhD at <a href="https://www.ecnu.edu.cn/">East China Normal University (ECNU)</a> in the <a href="http://dase.ecnu.edu.cn/">School of Data Science and Engineering</a>, where I was advised by <a href="http://dase.ecnu.edu.cn/mgao/index.html">Ming Gao</a> and <a href="https://lixiang3776.github.io/">Xiang Li</a>.

<p>My current research interests focus on the evaluation and analysis of large language models.</p>

<h4>Industry Experience</h4>
<p>I have gained substantial industry experience through several internships:</p>
<p><ul>
    <li><b>Alibaba (2021):</b> Interned with the NLP group, gaining insights into industry-level NLP applications.</li>
    <li><b>Meituan (2022):</b> Continued my journey with the NLP group, further honing my skills.</li>
    <li><b>Microsoft Xiaoice (Jan-Jun 2023):</b> Focused on enhancing the reasoning capabilities of large language models.</li>
    <li><b>Ant Group (Jun-Oct 2023):</b> Researched techniques to mitigate hallucinations in large language models.</li>
    <li><b>Shanghai AI Lab (Oct 2023-May 2024):</b> Concentrated on developing AI Agents for operating systems.</li>
    <li><b>Meituan (Since Jul 2024):</b> Full-time researcher.</li>
</ul></p>

<h4>Join My Team</h4>
<p>I'm currently on the lookout for interns interested in evaluation and analysis of large language models. If you're ready to dive into this exciting field, shoot me an email at <a href="mailto:hccngu@163.com">hccngu@163.com</a>. Let's explore the future of AI together!</p>

<h4>Personal Interests</h4>
<p>When I'm not doing NLP, I like to work out, play guitar, and read.</p>

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<h4>Updates</h4>
<ul>
    <li><i>September 2024:</i> We published a paper titled "<a href="https://arxiv.org/pdf/2409.06411">Length Desensitization in Directed Preference Optimization</a>", <b>addressing the length bias in DPO.</b> We hope it garners significant interest!</li>
    <li><i>March 2024:</i> We released <b>a self-improving embodied conversational agent</b>, <a href="https://os-copilot.github.io/">OS-Copilot</a>, seamlessly integrated into the operating system to automate our daily tasks. Friends who are interested can try it out~</li>
    <li><i>March 2024:</i> In March, we published a survey paper titled "<a href="https://arxiv.org/pdf/2403.14734.pdf">A Survey of Neural Code Intelligence: Paradigms, Advances, and Beyond</a>". We hope it attracts a lot of interest and attention!</li>
    <li><i>March 2024:</i> <b>2 papers</b> were accepted at <a href="https://lrec-coling-2024.org/">COLING 2024</a>. Check out the publications page for more info!</li>
    <li><i>October 2023:</i> <b>1 paper</b> accepted at <a href="https://2023.emnlp.org/">EMNLP 2023</a>. Check out publications page for more info!</li>
    <li><i>May 2023:</i> We've created an open-source project, <a href="https://github.com/hccngu/Viscacha">Viscacha</a>, aiming to release a comprehensive Chinese information extraction dataset. We welcome everyone to pay close attention to it~</li>
    <li><i>May 2023:</i> <b>1 paper</b> accepted at <a href="https://2023.aclweb.org/">ACL 2023</a>. Check out publications page for more info!</li>
    <li><i>February 2023:</i> Our team, <b>DataIsPower</b>, won the runner-up prize in the pre-trained language model application tuning algorithm category at <a href="https://iacc.pazhoulab-huangpu.com/lists/149.html">the Guangdong-Hong Kong-Macau Greater Bay Area International Algorithm Competition</a>, with a prize money of ¥200,000. We are so grateful!!!</li>
    <li><i>January 2023:</i> <b>1 paper</b> accepted at <a href="http://www.tjudb.cn/dasfaa2023/">DASFAA 2023</a>. Check out publications page for more info! Also, I attended DASFAA 2023 in person :)</li>
</ul>