diff --git a/ruoyi-bussiness/src/main/resources/mapper/ThemeGraduateInfoMapper.xml b/ruoyi-bussiness/src/main/resources/mapper/ThemeGraduateInfoMapper.xml
index 34e661f..3affcd0 100644
--- a/ruoyi-bussiness/src/main/resources/mapper/ThemeGraduateInfoMapper.xml
+++ b/ruoyi-bussiness/src/main/resources/mapper/ThemeGraduateInfoMapper.xml
@@ -323,7 +323,7 @@
         FROM (
         SELECT
         AAC044,
-        AAB022 AS code
+        SUBSTRING(AAB022 FROM 1 FOR 1) AS code
         FROM theme_graduate_info
         WHERE
         <!-- 引入公共条件 -->