diff --git a/pmapi/src/main/java/com/ningdatech/pmapi/common/helper/impl/RegionsCacheHelperImpl.java b/pmapi/src/main/java/com/ningdatech/pmapi/common/helper/impl/RegionsCacheHelperImpl.java
index 2c0fc01..5500fce 100644
--- a/pmapi/src/main/java/com/ningdatech/pmapi/common/helper/impl/RegionsCacheHelperImpl.java
+++ b/pmapi/src/main/java/com/ningdatech/pmapi/common/helper/impl/RegionsCacheHelperImpl.java
@@ -54,6 +54,9 @@ public class RegionsCacheHelperImpl extends AbstractRegionCacheHelper implements
     @Override
     public Collection<String> listChildRegionCodeList(String regionCode, int regionLevel) {
         RegionDTO currRegion = getByCodeAndLevel(regionCode, regionLevel);
+        if(Objects.isNull(currRegion)){
+            return Collections.emptyList();
+        }
         if (currRegion.getParentCode().equals(regionCode)) {
             return Collections.singletonList(regionCode);
         }