diff --git a/emis-biz/src/main/java/com/xdadan/erp/emis/service/impl/EmisCustomerUserServiceImpl.java b/emis-biz/src/main/java/com/xdadan/erp/emis/service/impl/EmisCustomerUserServiceImpl.java
index eca969e16..11e5b71ba 100644
--- a/emis-biz/src/main/java/com/xdadan/erp/emis/service/impl/EmisCustomerUserServiceImpl.java
+++ b/emis-biz/src/main/java/com/xdadan/erp/emis/service/impl/EmisCustomerUserServiceImpl.java
@@ -278,9 +278,9 @@ public class EmisCustomerUserServiceImpl extends EmisBaseService implements IEmi
                     LocalDate endDate = LocalDate.parse(endSendDate, formatter);
 
                     long monthsBetween = ChronoUnit.MONTHS.between(
-                        beginDate.withDayOfMonth(1),
-                        endDate.withDayOfMonth(1)
-                    );
+                            beginDate.withDayOfMonth(1),
+                            endDate.withDayOfMonth(1)
+                    ) + 1L;
 
                     if (monthsBetween < 3) {
                         throw new EmisBizError(EmisBizErrorType.PARAM_ERROR,