diff --git a/docs/Web开发/CS571.en.md b/docs/Web开发/CS571.en.md
index 9e7f896a..063ef8c3 100644
--- a/docs/Web开发/CS571.en.md
+++ b/docs/Web开发/CS571.en.md
@@ -16,7 +16,7 @@ Although this course doesn't require prior knowledge of Javascript/HTML/CSS, the
 
 This course also includes an introduction to and practices for Dialog Flow, a ChatBot development tool by Google. You can also find content related to UX development (on the practical side) in this course.
 
-All course materials and assignments are open-source, but you will need to request an X-CS571-ID header from the instructor, Cole Nelson (ctnelson2@wisc.edu). The header will be necessary for API request. When sending an email, it is advisable to include a brief self-introduction. It is unclear whether the instructor is willing to give everyone an ID. If you got turned down, please [raise an issue for this GitHub repo](https://github.com/PKUFlyingPig/cs-self-learning/issues/new/choose).
+According to the official website, CS 571 is open to everyone. You can request a Badger ID directly from the [webpage](https://cs571.org/auth) using your email address.
 
 ## Course Resources
 
diff --git a/docs/Web开发/CS571.md b/docs/Web开发/CS571.md
index 817bc319..e3a95bc0 100644
--- a/docs/Web开发/CS571.md
+++ b/docs/Web开发/CS571.md
@@ -16,10 +16,10 @@
 
 此外，本课程还对 Google 旗下的 ChatBot 开发工具 Dialog Flow 有较为深入的介绍和练习。还对 UX Design 的实用原则和技术有所讲解。
 
-所有课程资料和作业都是开源的，但你需要向授课教师 Cole Nelson (ctnelson2@wisc.edu) 发送电子邮件以获取 X-CS571-ID。该 ID 是向 API 发送 request 必需。在发送邮件时，建议附上自我介绍。目前还不清楚老师是否愿意给所有人提供ID，如果老师表示无法分享，请[在 GitHub repo 里提一个 issue](https://github.com/PKUFlyingPig/cs-self-learning/issues/new/choose)。
+根据官网信息，CS 571 对所有人开放。你可以在[官网](https://cs571.org/auth)直接使用电子邮箱申请 Badger ID。
 
 ## 课程资源
 
 - 课程网站：<https://cs571.org>
 - 课程视频：请参考课程网站上标有“R”的链接
-- 课程作业：请参考课程网站上的相关信息
\ No newline at end of file
+- 课程作业：请参考课程网站上的相关信息