fix 3人

zhongzheng-system/src/main/java/com/zhongzheng/modules/grade/service/impl/ClassGradeServiceImpl.java

@@ -787,7 +787,7 @@ public class ClassGradeServiceImpl extends ServiceImpl<ClassGradeMapper, ClassGr
                 } catch (IOException e) {
                     throw new CustomException("同步请求错误"+e.getMessage());
                 }
-                if((peopleNum+oldGradeNum)>=300){ //全系统平台二建班级人数不能超300
+                if((peopleNum+oldGradeNum)>=3){ //全系统平台二建班级人数不能超300
                     return false;
                 }
             }