diff --git a/gopractitioner.md b/gopractitioner.md
index 701754f..0215584 100644
--- a/gopractitioner.md
+++ b/gopractitioner.md
@@ -34,4 +34,8 @@ Sharding Techniques: Distributing the UTXO set across different nodes or shards
 PoW / BFT
 Layer1 / Layer2
 
+### 2025.03.09
+P2P network
+Previous hash, Mekle treeroot
+
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