diff --git a/modelcenter/PP-HelixFold/introduction_cn.ipynb b/modelcenter/PP-HelixFold/introduction_cn.ipynb
index dde5d1c22f39efeb102ea7e787309ee49b086871..21315a440f2956c70908ae7a39fa661c60bef86f 100644
--- a/modelcenter/PP-HelixFold/introduction_cn.ipynb
+++ b/modelcenter/PP-HelixFold/introduction_cn.ipynb
@@ -197,7 +197,7 @@
     "}\n",
     "```\n",
     "\n",
-    "## 6. 版权所有\n",
+    "## 7. 版权所有\n",
     "\n",
     "PP-HelixFold代码使用的是Apache 2.0 License许可文件，该许可与原版AlphaFold2相同。但是，我们使用了由DeepMind提供的AlphaFold2预训练模型参数，根据CC BY-NC 4.0 license许可文件规定，仅可用于非商业用途。\n"
    ]