diff --git a/protocol/README.md b/protocol/README.md
index 73c724c7..29a57064 100644
--- a/protocol/README.md
+++ b/protocol/README.md
@@ -190,7 +190,7 @@ your protocol number a little more compactly, so that your protocol number will
 
 ### Ⅸ. The difference between zfoo and Protobuf
 
-- Abandoning the deletion field of protobuf can also be compatible with the protocol, improving the performance by 1 times and reducing the cost by 1 times.
+- Abandoning the deletion field of protobuf can also be compatible with the protocol, improving the performance by 1 times and reducing the size by 1 times.
 
 - zfoo takes the intersection of type declarations in all languages, instead of protobuf taking the union, simplifying the type implementation of protobuf
     - protobuf
@@ -224,7 +224,7 @@ your protocol number a little more compactly, so that your protocol number will
       string
       ```
 
-- zfoo takes the intersection of the grammars of all languages, instead of the intersection of protobuf, and adds the grammar implementation of protobuf
+- zfoo takes the intersection of the grammars of all languages, instead of the union of protobuf, and adds the grammar implementation of protobuf
     - protobuf
       ```
       Collection nesting syntax is not supported
diff --git a/protocol/README_CN.md b/protocol/README_CN.md
index 0cd528ed..7b7aa997 100644
--- a/protocol/README_CN.md
+++ b/protocol/README_CN.md
@@ -158,7 +158,7 @@ cpu： i9900k
 
 ### Ⅸ. zfoo和Protobuf的区别
 
-- 舍弃protobuf的删除字段也可以兼容协议的方式，提升1倍的性能，减小1倍的
+- 舍弃protobuf的删除字段也可以兼容协议的方式，提升1倍的性能，减小1倍的体积
 
 - zfoo取所有语言的类型声明的交集，而不是protobuf取并集，简化protobuf的类型实现
     - protobuf
@@ -192,7 +192,7 @@ cpu： i9900k
       string
       ```
 
-- zfoo取所有语言的语法的交集，而不是protobuf的交集，增加protobuf的语法实现
+- zfoo取所有语言的语法的交集，而不是protobuf的并集，增加protobuf的语法实现
     - protobuf
       ```
       不支持集合嵌套语法