diff --git a/protocol/const.go b/protocol/const.go
index 40bdc72..1c341a8 100644
--- a/protocol/const.go
+++ b/protocol/const.go
@@ -1,5 +1,7 @@
 package protocol
 
+import "time"
+
 const (
 	TypeConnect            = 0x000D //建立连接
 	TypeHeart              = 0x0004 //心跳
@@ -12,6 +14,11 @@ const (
 	TypeKline              = 0x052D //K线图
 )
 
+var (
+	// ExchangeEstablish 交易所成立时间
+	ExchangeEstablish = time.Date(1990, 12, 19, 0, 0, 0, 0, time.Local)
+)
+
 /*
 从其他地方复制
 const (