EN.md

@@ -43,7 +43,7 @@ Choose one from three projects below:
 
 ## [3.Integration of DDR3 memory controller for RISC-V core]()
 
-## [4. BLDC controller based on RISC-V]()
+## [4. BLDC controller based on RISC-V](https://git.tongji.edu.cn/groups/intelli_chip_and_system_design_course/-/wikis/PRJ4.BLDC)
 
 ---