diff --git a/ProblemMap/article/README.md b/ProblemMap/article/README.md
index b607f66c..e5f86294 100644
--- a/ProblemMap/article/README.md
+++ b/ProblemMap/article/README.md
@@ -48,7 +48,7 @@ single place to find every Discussion article. each line links out. this page is
   Discussion →  [https://github.com/onestardao/WFGY/discussions/38](https://github.com/onestardao/WFGY/discussions/38)
 
 * **Day 14: Symbolic collapse** *(No.11)*
-  Discussion → \[TBD]
+  Discussion → [https://github.com/onestardao/WFGY/discussions/38](https://github.com/onestardao/WFGY/discussions/39)
 
 * **Day 15: Creative freeze** *(No.10)*
   Discussion → \[TBD]