diff --git a/docs/design/2020-09-12-utf8mb4_zh_0900_as_cs.md b/docs/design/2020-09-12-utf8mb4_zh_0900_as_cs.md
index 051a525ef45f8..7a3924eaa8c27 100644
--- a/docs/design/2020-09-12-utf8mb4_zh_0900_as_cs.md
+++ b/docs/design/2020-09-12-utf8mb4_zh_0900_as_cs.md
@@ -70,7 +70,7 @@ It is full compatible with MySQL.
 
 #### Disadvantages
 
- It's a lot of work if implements `utf8mb4_zh_0900_as_cs`. The implementation of MySQL looks complicated with weight reorders, magic numbers, and some sort of trick.
+It's a lot of work if implements `utf8mb4_zh_0900_as_cs`. The implementation of MySQL looks complicated with weight reorders, magic numbers, and some sort of trick.
 
 
 ## Compatibility and Mirgration Plan