diff --git a/doc/HomeWork/OSScan/1901210607.md b/doc/HomeWork/OSScan/1901210607.md
index 2f3f723d..0eff4f10 100644
--- a/doc/HomeWork/OSScan/1901210607.md
+++ b/doc/HomeWork/OSScan/1901210607.md
@@ -1,3 +1,14 @@
+# 2019/11/15 - 2019/11/21
+
+## Task list
+
+- Analyse the CVE data structure.
+  
+## Summary
+
+Take part in the first centralized development. Have a basic understanding about CVE(Common Vulnerabilities & Exposures) data structure.
+
+
 # 2019/11/08 - 2019/11/14
 
 ## Task list