diff --git a/_data/chains/eip155-20180430.json b/_data/chains/eip155-20180430.json
new file mode 100644
index 00000000..74471b39
--- /dev/null
+++ b/_data/chains/eip155-20180430.json
@@ -0,0 +1,22 @@
+{
+  "name": "SmartMesh Mainnet",
+  "chain": "Spectrum",
+  "rpc": [
+    "https://jsonapi1.smartmesh.cn"
+  ],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "SmartMesh Native Token",
+    "symbol": "SMT",
+    "decimals": 18
+  },
+  "infoURL": "https://smartmesh.io",
+  "shortName": "spectrum",
+  "chainId": 20180430,
+  "networkId": 1,
+  "explorers": [{
+    "name": "spectrum",
+    "url": "https://spectrum.pub",
+    "standard": "none"
+  }]
+}
\ No newline at end of file