diff --git a/README.md b/README.md
index 605eaeb..ba813af 100644
--- a/README.md
+++ b/README.md
@@ -322,4 +322,5 @@ Step 2: 按学生学号从小到大排序
 
 
 ### make_chart
-Step 1: 
\ No newline at end of file
+Step 1: Step 1: for 0 to num_part-1 图表
+Step 2: 以图表方式显示库存记录