diff --git a/README.md b/README.md
index d8d5e86..a228d53 100644
--- a/README.md
+++ b/README.md
@@ -12,14 +12,15 @@
 </p>
 
 <p align="center">
-<a href='https://docs.paperai.life/' style='font-size: 20px;'><strong>文档网站(教程比较详细,推荐在这里观看)</strong></a>
+<a href='https://docs.paperai.life/' style='font-size: 20px;'><strong>文档网站(教程比较详细,推荐阅读这里)</strong></a> ·
+<a href='https://www.bilibili.com/video/BV1Ya4y1k75V'><strong>bilibili视频教程</strong></a>
 </p>
 
 <p align="center">
   <a href="#功能"><strong>功能</strong></a> ·
   <a href="#演示"><strong>演示</strong></a> ·
   <a href="#部署到Vercel"><strong>部署到 Vercel</strong></a> ·
-  <a href="#克隆并在本地运行"><strong>克隆并在本地运行</strong></a> ·
+  <a href="#克隆并在本地运行"><strong>克隆并在本地运行</strong></a>
 </p>
 <br/>
 
diff --git a/README_en.md b/README_en.md
index f09820c..181aa4e 100644
--- a/README_en.md
+++ b/README_en.md
@@ -10,14 +10,15 @@
 </p>
 
 <p align="center">
-<a href='https://docs.paperai.life/' style='font-size: 20px;'><strong> Website Documentation (detailed tutorials, highly recommended)</strong></a>
+<a href='https://docs.paperai.life/' style='font-size: 20px;'><strong> Website Documentation (detailed tutorials, highly recommended)</strong></a> ·
+<a href='https://www.bilibili.com/video/BV1Ya4y1k75V'><strong>bilibili Video Tutorial</strong></a>
 </p>
 
 <p align="center">
   <a href="#features"><strong>Features</strong></a> ·
   <a href="#demo"><strong>Demo</strong></a> ·
   <a href="#deploy-to-vercel"><strong>Deploy to Vercel</strong></a> ·
-  <a href="#clone-and-run-locally"><strong>Clone and run locally</strong></a> ·
+  <a href="#clone-and-run-locally"><strong>Clone and run locally</strong></a>
   <!-- <a href="#feedback-and-issues"><strong>Feedback and issues</strong></a>
   <a href="#more-supabase-examples"><strong>More Examples</strong></a> -->
 </p>
@@ -63,7 +64,13 @@ docker run -d -p 3000:3000 \
   14790897/paperai:latest
 ```
 
-Replace `CUSTOM_AI_URL` and `CUSTOM_API_KEY` to your own model path and API key
+Replace `CUSTOM_AI_URL` and `CUSTOM_API_KEY` to your own AI URL and API key
+
+## Environment variable description
+1. NEXT_PUBLIC_OPENAI_API_KEY sets the key. Simply leave the corresponding position in the settings interface (the gear in the upper right corner) blank, the predetermined variable will be used.
+2. NEXT_PUBLIC_AI_URL sets the upstream url. Simply leave the corresponding position in the settings interface (the gear in the upper right corner)  blank, the predetermined variable will be used.
+3. NEXT_PUBLIC_SEMANTIC_API_KEY sets the `semantic scholar` key to increase the number of requests
+4. NEXT_PUBLIC_PUBMED_API_KEY sets the `pubmed` key to increase the number of requests
 
 ## Clone and run locally
 
@@ -82,6 +89,12 @@ npm run dev
 
  ```
 
+## Reference
+
+1. semantic scholar api: https://api.semanticscholar.org/api-docs/#tag/Paper-Data/operation/get_graph_paper_relevance_search
+2. pubmed api: https://www.ncbi.nlm.nih.gov/books/NBK25500/
+3. i18n: https://locize.com/blog/next-app-dir-i18n/
+
 ## LICENSE
 This repository is licensed under the MIT License