diff --git a/README.md b/README.md
index 16d5f58..0956394 100644
--- a/README.md
+++ b/README.md
@@ -28,8 +28,8 @@ The first file is used for CH32V303 devices, which lacks of the following periph
 
 ** Change the startup file to the correct version for the hardware in use. **
 
-## Compilers
-These MCUs uses something called "RISC-V4A" core without further documentation provided, AFAIK.
+### Compilers
+These MCUs uses something called "RISC-V4A" core with Chinese documentation provided.
 
 Here is the list of features proprietary or incompatible with upstream toolchain:
 * Fast IRQ handlers: uses a special attribute of `interrupt`, which value is `WCH-Interrupt-fast`
\ No newline at end of file