diff --git a/sources/tech/20171024 Learn Blockchains by Building One.md b/sources/tech/20171024 Learn Blockchains by Building One.md
index d8a2069b0b..6edffe0179 100644
--- a/sources/tech/20171024 Learn Blockchains by Building One.md	
+++ b/sources/tech/20171024 Learn Blockchains by Building One.md	
@@ -1,3 +1,5 @@
+translating by yizhuoyan
+
 Learn Blockchains by Building One
 ======