diff --git a/business/jxstore/event/event_tcp_utils.go b/business/jxstore/event/event_tcp_utils.go
index 9687993f0..94fec74e2 100644
--- a/business/jxstore/event/event_tcp_utils.go
+++ b/business/jxstore/event/event_tcp_utils.go
@@ -377,7 +377,7 @@ func buildMsg(printMsg *model.PrintMsg) (data []byte, err error) {
 	lenData := int64(len(str) + len(const1) + len(orderNoHexH) + len(orderNoHexL) + len(printInit) + 2 + 4 + len(printData))
 	x1, x2 := int2h8l8(lenData / 2)
 	dataStr := str + x1 + x2 + const1 + orderNoHexH + orderNoHexL + printInit + printData
-	dataStr = `1e00140200ff50bc147df3d71b401B59415515`
+	dataStr = `1e00140200ff50bc147df3d71b401B59415515ff`
 	check := getCheckSum(dataStr)
 	return jxutils.Hextob(dataStr + check), err
 }
diff --git a/business/jxstore/event/print_test.go b/business/jxstore/event/print_test.go
index d6bc30e59..d9509c0f6 100644
--- a/business/jxstore/event/print_test.go
+++ b/business/jxstore/event/print_test.go
@@ -42,3 +42,7 @@ func Test10Two16(t *testing.T) {
 	hexPrefixStr := hex.EncodeToString(hexPrefix)
 	fmt.Println(hexPrefixStr)
 }
+
+func TestCheckSum(t *testing.T) {
+	getCheckSum(`1e00140200ff50bc147df3d71b401B59415515`)
+}