diff --git a/basic/moon.go b/basic/moon.go
index c218495..e739f75 100644
--- a/basic/moon.go
+++ b/basic/moon.go
@@ -1136,7 +1136,7 @@ func CalcMoonSH(Year float64, C int) float64 {
 		JD0 := JD1
 		stDegree := SunMoonSeek(JD0) - float64(C)
 		stDegreep := (SunMoonSeek(JD0+0.000005) - SunMoonSeek(JD0-0.000005)) / 0.00001
-		JD1 := JD0 - stDegree/stDegreep
+		JD1 = JD0 - stDegree/stDegreep
 		if math.Floor(JD1-JD0) <= 0.000001 {
 			break
 		}
@@ -1219,7 +1219,7 @@ func CalcMoonXH(Year float64, C int) float64 {
 		JD0 := JD1
 		stDegree := SunMoonSeek(JD0) - float64(C)
 		stDegreep := (SunMoonSeek(JD0+0.000005) - SunMoonSeek(JD0-0.000005)) / 0.00001
-		JD1 := JD0 - stDegree/stDegreep
+		JD1 = JD0 - stDegree/stDegreep
 		if math.Floor(JD1-JD0) <= 0.000001 {
 			break
 		}
@@ -1381,7 +1381,7 @@ func GetMoonTZTime(JD, Lon, Lat, TZ float64) float64 { //实际中天时间{
 		JD0 := JD1
 		stDegree := MoonTimeAngle(JD0, Lon, Lat, TZ) - 359.599
 		stDegreep := (MoonTimeAngle(JD0+0.000005, Lon, Lat, TZ) - MoonTimeAngle(JD0-0.000005, Lon, Lat, TZ)) / 0.00001
-		JD1 := JD0 - stDegree/stDegreep
+		JD1 = JD0 - stDegree/stDegreep
 		if math.Floor(JD1-JD0) <= 0.000001 {
 			break
 		}
diff --git a/basic/sun.go b/basic/sun.go
index 9d48e78..d4a696d 100644
--- a/basic/sun.go
+++ b/basic/sun.go
@@ -1371,7 +1371,7 @@ func SunAngle(JD, Lon, Lat, TZ float64) float64 {
 func GetGZ(year int) string {
 	tiangan := []string{"庚", "辛", "壬", "癸", "甲", "乙", "丙", "丁", "戊", "已"}
 	dizhi := []string{"申", "酉", "戌", "亥", "子", "丑", "寅", "卯", "辰", "巳", "午", "未"}
-	t := year - (year / 100 * 10)
+	t := year - (year / 10 * 10)
 	d := year % 12
 	return tiangan[t] + dizhi[d] + "年"
 }