diff --git a/README.md b/README.md
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@@ -11,7 +11,7 @@ Welcome to Open-Source OS Training Comp 2022（2022年开源操作系统训练
 - [rCore Tutorial v3 Guide](https://rcore-os.github.io/rCore-Tutorial-Book-v3/) (2022春季OS课程讲义)
 - [OS Course Slides in 2022 spring](https://learningos.github.io/os-lectures/)(2022春季OS课程Slides)
 - [OS Course Videos in 2022 spring](./relatedinfo.md)(2022春季OS课程Videos)
-- 
+
 First, you can read [Guide](https://learningos.github.io/rust-based-os-comp2022/) to:
 - (Important) `git clone` this repo.
 - (Important) setup development environment.