diff --git a/Runtime/Utilities/DateTimeUtil.cs b/Runtime/Utilities/DateTimeUtil.cs
index 8d569f01..77b27def 100644
--- a/Runtime/Utilities/DateTimeUtil.cs
+++ b/Runtime/Utilities/DateTimeUtil.cs
@@ -128,8 +128,9 @@ namespace XCharts.Runtime
             if (range >= ONE_YEAR * MIN_TIME_SPLIT_NUMBER)
             {
                 var num = splitNumber <= 0 ? GetSplitNumber(range, ONE_YEAR) : Math.Max(range / (splitNumber * ONE_YEAR), 1);
-                var dtStart = (firstValue == 0 || secondValue == 0) ? new DateTime(dtMin.Year + 1, 1, 1) :
-                    (minTimestamp > firstValue ? DateTimeUtil.GetDateTime(secondValue) : DateTimeUtil.GetDateTime(firstValue));
+                var dtStart = (firstValue == 0 || secondValue == 0 || (minTimestamp > firstValue && minTimestamp > secondValue))
+                    ? (new DateTime(dtMin.Year, dtMin.Month, 1).AddMonths(1))
+                    : (minTimestamp > firstValue ? DateTimeUtil.GetDateTime(secondValue) : DateTimeUtil.GetDateTime(firstValue));
                 tick = num * 365 * 24 * 3600;
                 while (dtStart.Ticks < dtMax.Ticks)
                 {
@@ -140,8 +141,9 @@ namespace XCharts.Runtime
             else if (range >= ONE_MONTH * MIN_TIME_SPLIT_NUMBER)
             {
                 var num = splitNumber <= 0 ? GetSplitNumber(range, ONE_MONTH) : Math.Max(range / (splitNumber * ONE_MONTH), 1);
-                var dtStart = (firstValue == 0 || secondValue == 0) ? (new DateTime(dtMin.Year, dtMin.Month, 1).AddMonths(1)) :
-                    (minTimestamp > firstValue ? DateTimeUtil.GetDateTime(secondValue) : DateTimeUtil.GetDateTime(firstValue));
+                var dtStart = (firstValue == 0 || secondValue == 0 || (minTimestamp > firstValue && minTimestamp > secondValue))
+                    ? (new DateTime(dtMin.Year, dtMin.Month, 1).AddMonths(1))
+                    : (minTimestamp > firstValue ? DateTimeUtil.GetDateTime(secondValue) : DateTimeUtil.GetDateTime(firstValue));
                 tick = num * 30 * 24 * 3600;
                 while (dtStart.Ticks < dtMax.Ticks)
                 {