diff --git a/README.md b/README.md
index 7b2ad4b..b2866a4 100755
--- a/README.md
+++ b/README.md
@@ -908,7 +908,8 @@ Table of Contents
 - [The Building Blocks of a Quantum Computer: Part 1 - TU Delft](https://ocw.tudelft.nl/courses/building-blocks-quantum-computer-part-1/)
 - [The Building Blocks of a Quantum Computer: Part 2 - TU Delft](https://ocw.tudelft.nl/courses/building-blocks-quantum-computer-part-2/)
 - [Quantum Cryptography - TU Delft](https://ocw.tudelft.nl/courses/quantum-cryptography/)
-
+- [Introduction to Quantum Information](https://zhenyucai.com/post/intro_to_qi/
+)
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 ### Robotics