diff --git a/docs/操作系统/CS162.en.md b/docs/操作系统/CS162.en.md
index 3ee1590e..c2409d96 100644
--- a/docs/操作系统/CS162.en.md
+++ b/docs/操作系统/CS162.en.md
@@ -18,7 +18,7 @@ Unlike MIT's xv6 with a small but exquisite lab design philosophy, Pintos focuse
 
 Although it is tough, Stanford, Berkeley, JHU and many other top U.S. Schools have adopted Pintos for their OS courses. If you're really interested in operating systems, Pintos will greatly improve your ability to write and debug the underlying system code. It is an invaluable experience at the undergraduate level to design, implement, and debug a large system on your own.
 
-Pintos will also be introduced as a course project for the first time in Peking University's OS Lab class in the Spring 2022 semester. [Another teaching assistants]((https://www.quora.com/What-is-it-like-to-take-CS-140-Operating-Systems-at-Stanford)) of the course and I have compiled and perfected the experimental documentation of Pintos, and configured a cross-platform [experimental environment](https://alfredthiel.gitbook.io/pintosbook/) using Docker, if you want to learn on your own, you can follow the documentation. In the last semester before graduation, I hope to use such an attempt to make more people fall in love with the field of systems and to contribute to the research of systems of China.
+Pintos will also be introduced as a course project for the first time in Peking University's OS Lab class in the Spring 2022 semester. [Another teaching assistants](https://github.com/AlfredThiel) of the course and I have compiled and perfected the experimental documentation of Pintos, and configured a cross-platform [experimental environment](https://alfredthiel.gitbook.io/pintosbook/) using Docker, if you want to learn on your own, you can follow the documentation. In the last semester before graduation, I hope to use such an attempt to make more people fall in love with the field of systems and to contribute to the research of systems of China.
 
 ## Course Resources