diff --git a/README.md b/README.md
index 0d8bf6e..6da0afa 100644
--- a/README.md
+++ b/README.md
@@ -684,13 +684,13 @@ Book* read1()
 针对概要设计
 
 C1:void ShowLibInfo(const Book* book, const Reader* reader);\\查询图书馆的总信息
-
+![c2](c2.svg)
 C2:void ShowLibBook(Book* book);\\查询图书馆藏书信息
-
+![c3](c3.svg)
 C3:Book* AddBook(Book* book);\\存入新书
-
+![c4](c4.svg)
 C4:Book* DealoldBook(Book* book);\\旧书处理
-
+![c5](c5.svg)
 C5:void foundBook(Book* book);\\根据书名检索书刊信息
 ![555](foundbook.svg)
 C6:void foundReader_Info(Reader* reader);\\查询读者的借阅信息