支付宝提交开户意愿，PeriodEnd字段判断9999为长期

Util/HaoDa/AlipayFunctionForHD.cs

@@ -37,7 +37,7 @@ namespace MySystem
             if (identity_type == "SUBJECT_TYPE_INDIVIDUAL") identity_type = "IND_BIZ";
             if (identity_type == "SUBJECT_TYPE_SMALL") identity_type = "MSE";
             string PeriodEnd = info.PeriodEnd.Value.ToString("yyyy-MM-dd");
-            if (PeriodEnd.Substring(0, 4) == "2050")
+            if (PeriodEnd.Substring(0, 4) == "9999")
             {
                 PeriodEnd = "forever";
             }