diff --git a/_data/chains/eip155-3999.json b/_data/chains/eip155-3999.json
new file mode 100644
index 00000000..f6bb57cf
--- /dev/null
+++ b/_data/chains/eip155-3999.json
@@ -0,0 +1,24 @@
+{
+  "name": "YuanChain Mainnet",
+  "chain": "YCC",
+  "network": "mainnet",
+  "rpc": [
+    "https://mainnet.yuan.org/eth"
+  ],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "YCC",
+    "symbol": "YCC",
+    "decimals": 18
+  },
+  "infoURL": "https://www.yuan.org",
+  "shortName": "ycc",
+  "chainId": 3999,
+  "networkId": 3999,
+  "icon": "ycc",
+  "explorers": [{
+    "name": "YuanChain Explorer",
+    "url": "https://mainnet.yuan.org",
+    "standard": "none"
+  }]
+}
\ No newline at end of file
diff --git a/_data/icons/ycc.json b/_data/icons/ycc.json
new file mode 100644
index 00000000..1b5f0534
--- /dev/null
+++ b/_data/icons/ycc.json
@@ -0,0 +1,8 @@
+[
+  {
+    "url":"ipfs://QmdbPhiB5W2gbHZGkYsN7i2VTKKP9casmAN2hRnpDaL9W4",
+    "width":96,
+    "height":96,
+    "format":"png"
+  }
+]
\ No newline at end of file