diff --git a/models/base/Const.go b/models/base/Const.go
index 11f7687..33f97a7 100644
--- a/models/base/Const.go
+++ b/models/base/Const.go
@@ -138,4 +138,32 @@ const (
 
 	TRIGGER_FROM_BARCODE = "自主条码"
 	TRIGGER_DEPEND_ON_UNITSN = "UNITSN"
-)
\ No newline at end of file
+)
+
+
+var YEAR_MAP = map[int]string{
+	2018: "J",
+	2019: "K",
+	2020: "L",
+	2021: "M",
+	2022: "N",
+	2023: "P",
+	2024: "R",
+	2025: "S",
+	2026: "T",
+}
+
+var MONTH_MAP = map[int]string{
+	1: "1",
+	2: "2",
+	3: "3",
+	4: "4",
+	5: "5",
+	6: "6",
+	7: "7",
+	8: "8",
+	9: "9",
+	10: "A",
+	11: "B",
+	12: "C",
+}
\ No newline at end of file