diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/README.md b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/README.md
index cac694de7..7129b3ed3 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/README.md
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/README.md
@@ -2,14 +2,14 @@
 
 ## Overview
 
-Note: `head` and `body` functions does nothing. They just work as
+Note: `head` and `body` functions do nothing. They just work as
 notations
 
 PseudoCode:
 ```
 OutgoingPacket { 
+    int head.size + body.size + 4
     head {
-        int      remaining.length + 4
         int      0x0A
         byte     0x02
         int      extra data size + 4