diff --git a/src/SysFunc.java b/src/SysFunc.java
index 328a8e4..9266825 100644
--- a/src/SysFunc.java
+++ b/src/SysFunc.java
@@ -98,7 +98,9 @@ public class SysFunc {
             while (true) {
                 System.out.print(BOLD + BLUE + "> " + RESET);
                 String choice_type = scanner.nextLine();
-                if (choice_type.length() >= 5 && choice_type.substring(0, 3).equals("切换为") && typeMap.containsKey(choice_type.substring(3))) {
+                if (choice_type.length() >= 5 
+                    && choice_type.substring(0, 3).equals("切换为") 
+                    && typeMap.containsKey(choice_type.substring(3))) {
                     type = typeMap.get(choice_type.substring(3));
                     if (type == 1) {
                         teacher = new PrimaryTea(teacher.name, teacher.password, teacher.path);