diff --git a/zt-module-base/zt-module-base-server/src/main/resources/mapper/base/FactoryMapper.xml b/zt-module-base/zt-module-base-server/src/main/resources/mapper/base/FactoryMapper.xml
index a212af0..8f33036 100644
--- a/zt-module-base/zt-module-base-server/src/main/resources/mapper/base/FactoryMapper.xml
+++ b/zt-module-base/zt-module-base-server/src/main/resources/mapper/base/FactoryMapper.xml
@@ -10,6 +10,6 @@
      -->
 
     <select id="selectMaxCode" resultType="java.lang.String">
-        SELECT MAX(coding) FROM sply_fact
+        SELECT MAX(NUM) FROM sply_fact
     </select>
 </mapper>
\ No newline at end of file