diff --git a/laws-modules/src/main/java/com/jero/modules/laws/consultation/common/DirectoryComparator.java b/laws-modules/src/main/java/com/jero/modules/laws/consultation/common/DirectoryComparator.java
index 1336c73a..c9f92371 100644
--- a/laws-modules/src/main/java/com/jero/modules/laws/consultation/common/DirectoryComparator.java
+++ b/laws-modules/src/main/java/com/jero/modules/laws/consultation/common/DirectoryComparator.java
@@ -1,6 +1,7 @@
 package com.jero.modules.laws.consultation.common;
 
 import com.jero.modules.activiti.process.fb.entity.ProcessFbConsultationList;
+import org.apache.commons.lang3.StringUtils;
 
 import java.util.Comparator;
 
@@ -16,6 +17,10 @@ public class DirectoryComparator implements Comparator<ProcessFbConsultationList
         String sortNumber1 = dir1.getChapterNumber();
         String sortNumber2 = dir2.getChapterNumber();
 
+        if(StringUtils.isBlank(sortNumber1) || StringUtils.isBlank(sortNumber2)){
+            return 0;
+        }
+
         String[] parts1 = sortNumber1.split("\\.");
         String[] parts2 = sortNumber2.split("\\.");