diff --git a/README.md b/README.md
index 3d85400..674c7dc 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,8 @@ Join link: [Google meet](https://meet.google.com/jyx-mxnq-kpk)
 
 ## 2026 1Q meetup list
 
-- [275th, 2026-02-21](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/527), will be open
+- [276th, 2026-02-28](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/528), will be open
+- [275th, 2026-02-21](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/527), joined 2
 - [274th, 2026-02-14](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/525), joined 4
 - [273th, 2026-02-07](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/524), joined 3
 - [272th, 2026-01-31](https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/519), joined 5
@@ -490,8 +491,8 @@ and participate more than 30 online meetup, get the chicken gifticon.
 
 |Ranking|Name|Count|
 |-------|----|-----|
-|1|[Kim Jong Feel](https://github.com/jongfeel/)|7|
-|2|[최지윤](https://github.com/chichoon/)|7|
+|1|[Kim Jong Feel](https://github.com/jongfeel/)|8|
+|2|[최지윤](https://github.com/chichoon/)|8|
 |3|[Yeshin Lee](https://github.com/yeslee-v/)|6|
 |4|[LeeDaYeon](https://github.com/ErigoLee/)|4|
 |5|[TaeWon](https://github.com/ytw9699/)|3|
@@ -501,8 +502,8 @@ and participate more than 30 online meetup, get the chicken gifticon.
 
 |Ranking|Name|Count|
 |-------|----|-----|
-|1|[jongfeel](https://github.com/jongfeel/)|269|
-|2|[최지윤](https://github.com/chichoon)|178|
+|1|[jongfeel](https://github.com/jongfeel/)|270|
+|2|[최지윤](https://github.com/chichoon)|179|
 |3|[yeslee-v](https://github.com/yeslee-v/)|109|
 |4|[Jeongan Lee](https://github.com/fkdl0048/)|51|
 |5|[TaeWon](https://github.com/ytw9699/)|47|
diff --git a/Stamp/README.md b/Stamp/README.md
index c9233e6..353c028 100644
--- a/Stamp/README.md
+++ b/Stamp/README.md
@@ -26,8 +26,8 @@
 
 | Name | 01-03 (268th) | 01-10 (269th) | 01-17 (270th) | 01-24 (271th) | 01-31 (272th) | 02-07 (273th) | 02-14 (274th) | 02-21 (275th) | 02-28 (276th) | 03-07 (277th) | 03-14 (278th) | 03-21 (279th) | 03-28 (280th) |
 |-|-|-|-|-|-|-|-|-|-|-|-|-|-|
-| [Kim Jong Feel](https://github.com/jongfeel/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/514#issuecomment-3706592905"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/515#issuecomment-3731404198"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/517#issuecomment-3762491965"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/518#issuecomment-3793377941"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/519#issuecomment-3827142452"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/524#issuecomment-3863335319"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/525#issuecomment-3900442926"><img src="approved_1Q.png"/></a> | 
-| [최지윤](https://github.com/chichoon) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/514#issuecomment-3706579591"><img src="approved_1Q.png"/>book 16/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/515#issuecomment-3726416555"><img src="approved_1Q.png"/><img src="Starbucks_americano.JPG"/>book 17/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/517#issuecomment-3748315626"><img src="approved_1Q.png"/>book 18/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/518#issuecomment-3793340101"><img src="approved_1Q.png"/>book 19/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/519#issuecomment-3802717566"><img src="approved_1Q.png"/>book 20/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/524#issuecomment-3863284869"><img src="approved_1Q.png"/><img src="Starbucks_americano.JPG"/><img src="approved_1Q.png"/>book 1/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/525#issuecomment-3900425233"><img src="approved_1Q.png"/>book 2/20</a> | 
+| [Kim Jong Feel](https://github.com/jongfeel/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/514#issuecomment-3706592905"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/515#issuecomment-3731404198"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/517#issuecomment-3762491965"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/518#issuecomment-3793377941"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/519#issuecomment-3827142452"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/524#issuecomment-3863335319"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/525#issuecomment-3900442926"><img src="approved_1Q.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/527#issuecomment-3937918033"><img src="approved_1Q.png"/></a> | 
+| [최지윤](https://github.com/chichoon) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/514#issuecomment-3706579591"><img src="approved_1Q.png"/>book 16/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/515#issuecomment-3726416555"><img src="approved_1Q.png"/><img src="Starbucks_americano.JPG"/>book 17/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/517#issuecomment-3748315626"><img src="approved_1Q.png"/>book 18/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/518#issuecomment-3793340101"><img src="approved_1Q.png"/>book 19/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/519#issuecomment-3802717566"><img src="approved_1Q.png"/>book 20/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/524#issuecomment-3863284869"><img src="approved_1Q.png"/><img src="Starbucks_americano.JPG"/><img src="approved_1Q.png"/>book 1/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/525#issuecomment-3900425233"><img src="approved_1Q.png"/>book 2/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/527#issuecomment-3937871053"><img src="approved_1Q.png"/><img src="approved_1Q.png"/><img src="Starbucks_americano.JPG"/>book 3/20</a> | 
 | [Yeshin Lee](https://github.com/yeslee-v/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/514#issuecomment-3705171107"><img src="approved_1Q.png"/>book 19/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/515#issuecomment-3731338037"><img src="approved_1Q.png"/>book 20/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/515#issuecomment-3731338037"><img src="approved_1Q.png"/>book 1/20</a> | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/519#issuecomment-3823789891"><img src="approved_1Q.png"/><img src="Starbucks_americano.JPG"/>book 2/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/524#issuecomment-3863328596"><img src="approved_1Q.png"/><img src="approved_1Q.png"/>book 3/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/525#issuecomment-3900498865"><img src="approved_1Q.png"/>book 4/20</a> | 
 | [LeeDaYeon](https://github.com/ErigoLee/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/514#issuecomment-3706578972"><img src="approved_1Q.png"/><img src="Starbucks_americano.JPG"/>book 3/20</a> | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/518#issuecomment-3793343060"><img src="approved_1Q.png"/>book 4/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/519#issuecomment-3827095902"><img src="approved_1Q.png"/>book 5/20</a> | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/525#issuecomment-3900394490"><img src="approved_1Q.png"/>book 6/20</a> |
 | [TaeWon](https://github.com/ytw9699/) | | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/518#issuecomment-3793606675"><img src="approved_1Q.png"/>book 15/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/519#issuecomment-3827006937"><img src="approved_1Q.png"/>book 16/20</a> |