diff --git a/packages/neuron-wallet/src/controllers/api.ts b/packages/neuron-wallet/src/controllers/api.ts
index 189dc30381..e36054e311 100644
--- a/packages/neuron-wallet/src/controllers/api.ts
+++ b/packages/neuron-wallet/src/controllers/api.ts
@@ -246,8 +246,8 @@ export default class ApiController {
   }
 
   @MapApiResponse
-  public static async createNetwork({ name, remote, type = NetworkType.Normal, chain = 'ckb' }: Network) {
-    return NetworksController.create({ name, remote, type, chain })
+  public static async createNetwork({ name, remote, type = NetworkType.Normal, genesisHash = '0x', chain = 'ckb' }: Network) {
+    return NetworksController.create({ name, remote, type, genesisHash, chain })
   }
 
   @MapApiResponse
diff --git a/packages/neuron-wallet/src/env.ts b/packages/neuron-wallet/src/env.ts
index f4a3e0ba2f..e18ef7a3a5 100644
--- a/packages/neuron-wallet/src/env.ts
+++ b/packages/neuron-wallet/src/env.ts
@@ -1,7 +1,6 @@
 import { app as electronApp, remote } from 'electron'
 import os from 'os'
 import * as path from 'path'
-import { NetworkWithID } from 'types/network'
 
 const app = electronApp || (remote && remote.app) || {
   getPath(aPath: string): string {
@@ -35,10 +34,6 @@ interface ENV {
   fileBasePath: string
   mainURL: string
   remote: string
-  presetNetworks: {
-    current: 'testnet'
-    list: NetworkWithID[]
-  }
   isTestMode: boolean
 }
 const env: ENV = {
@@ -46,25 +41,6 @@ const env: ENV = {
   fileBasePath: path.resolve(app.getPath('userData'), fileBase),
   mainURL: isDevMode ? 'http://localhost:3000' : `file://${path.join(__dirname, '../dist/neuron-ui/index.html')}`,
   remote: 'http://localhost:8114',
-  presetNetworks: {
-    current: 'testnet',
-    list: [
-      {
-        id: 'testnet',
-        name: 'Testnet',
-        remote: 'http://localhost:8114',
-        type: 0,
-        chain: '',
-      },
-      {
-        id: 'local',
-        name: 'Local',
-        remote: 'http://localhost:8114',
-        type: 1,
-        chain: '',
-      },
-    ],
-  },
   isTestMode,
 }
 
diff --git a/packages/neuron-wallet/src/services/networks.ts b/packages/neuron-wallet/src/services/networks.ts
index 45a82e58bc..c36d800a90 100644
--- a/packages/neuron-wallet/src/services/networks.ts
+++ b/packages/neuron-wallet/src/services/networks.ts
@@ -4,16 +4,29 @@ import { BehaviorSubject } from 'rxjs'
 import { LackOfDefaultNetwork, DefaultNetworkUnremovable } from 'exceptions/network'
 
 import Store from 'models/store'
-import env from 'env'
 
 import { Validate, Required } from 'decorators'
 import { UsedName, NetworkNotFound, InvalidFormat } from 'exceptions'
 import { NetworkListSubject, CurrentNetworkIDSubject } from 'models/subjects/networks'
-import { NetworkID, NetworkName, NetworkRemote, NetworksKey, NetworkType, Network, NetworkWithID } from 'types/network'
+import { MAINNET_GENESIS_HASH, NetworkID, NetworkName, NetworkRemote, NetworksKey, NetworkType, Network, NetworkWithID } from 'types/network'
 import logger from 'utils/logger'
 
 export const networkSwitchSubject = new BehaviorSubject<undefined | NetworkWithID>(undefined)
 
+const presetNetworks: { selected: string, networks: NetworkWithID[] } = {
+  selected: 'mainnet',
+  networks: [
+    {
+      id: 'mainnet',
+      name: 'Mainnet',
+      remote: 'http://localhost:8114',
+      genesisHash: MAINNET_GENESIS_HASH,
+      type: NetworkType.Default,
+      chain: 'ckb',
+    }
+  ]
+}
+
 export default class NetworksService extends Store {
   private static instance: NetworksService
 
@@ -25,7 +38,7 @@ export default class NetworksService extends Store {
   }
 
   constructor() {
-    super('networks', 'index.json', JSON.stringify(env.presetNetworks))
+    super('networks', 'index.json', JSON.stringify(presetNetworks))
 
     this.getAll().then(currentNetworkList => {
       if (currentNetworkList) {
@@ -88,7 +101,7 @@ export default class NetworksService extends Store {
 
   public getAll = async () => {
     const list = await this.read<NetworkWithID[]>(NetworksKey.List)
-    return list || []
+    return list || presetNetworks.networks
   }
 
   @Validate
@@ -102,15 +115,11 @@ export default class NetworksService extends Store {
     if (!Array.isArray(networks)) {
       throw new InvalidFormat('Networks')
     }
-    await this.writeSync(NetworksKey.List, networks)
+    this.writeSync(NetworksKey.List, networks)
   }
 
   @Validate
-  public async create(
-    @Required name: NetworkName,
-    @Required remote: NetworkRemote,
-    type: NetworkType = NetworkType.Normal,
-  ) {
+  public async create(@Required name: NetworkName, @Required remote: NetworkRemote, type: NetworkType = NetworkType.Normal) {
     const list = await this.getAll()
     if (list.some(item => item.name === name)) {
       throw new UsedName('Network')
@@ -122,11 +131,15 @@ export default class NetworksService extends Store {
       .getBlockchainInfo()
       .then(info => info.chain)
       .catch(() => '')
+    const genesisHash = await core.rpc
+      .getBlockHash('0x0')
+      .catch(() => '0x')
 
     const newOne = {
       id: uuid(),
       name,
       remote,
+      genesisHash,
       type,
       chain,
     }
@@ -146,11 +159,17 @@ export default class NetworksService extends Store {
     Object.assign(network, options)
     if (!options.chain) {
       const core = new Core(network.remote)
+
       const chain = await core.rpc
         .getBlockchainInfo()
         .then(info => info.chain)
         .catch(() => '')
       network.chain = chain
+
+      const genesisHash = await core.rpc
+        .getBlockHash('0x0')
+        .catch(() => '0x')
+      network.genesisHash = genesisHash
     }
 
     this.updateAll(list)
@@ -183,6 +202,11 @@ export default class NetworksService extends Store {
     }
     this.writeSync(NetworksKey.Current, id)
 
+    // No need to update the default mainnet
+    if (network.type === NetworkType.Default) {
+      return
+    }
+
     const core = new Core(network.remote)
 
     const chain = await core.rpc
@@ -190,8 +214,12 @@ export default class NetworksService extends Store {
       .then(info => info.chain)
       .catch(() => '')
 
-    if (chain && chain !== network.chain) {
-      this.update(id, { chain })
+      const genesisHash = await core.rpc
+        .getBlockHash('0x0')
+        .catch(() => '0x')
+
+    if (chain && chain !== network.chain && genesisHash && genesisHash !== network.genesisHash) {
+      this.update(id, { chain, genesisHash })
     }
   }
 
diff --git a/packages/neuron-wallet/src/types/network.ts b/packages/neuron-wallet/src/types/network.ts
index b035d485b6..687a80ebdb 100644
--- a/packages/neuron-wallet/src/types/network.ts
+++ b/packages/neuron-wallet/src/types/network.ts
@@ -1,22 +1,28 @@
 export type NetworkID = string
 export type NetworkName = string
 export type NetworkRemote = string
+export type NetworkGenesisHash = string
+
 export enum NetworksKey {
-  List = 'list',
-  Current = 'current',
+  List = 'networks',
+  Current = 'selected',
 }
 
 export enum NetworkType {
-  Default,
+  Default, // Preset mainnet node
   Normal,
 }
 
+export const MAINNET_GENESIS_HASH = "0x" // TODO: set this when mainnet launches!
+
 export interface Network {
   name: NetworkName
   remote: NetworkRemote
   type: NetworkType
+  genesisHash: NetworkGenesisHash
   chain: 'ckb' | 'ckb_testnet' | 'ckb_dev' | string // returned by rpc.getBlockchainInfo
 }
+
 export interface NetworkWithID extends Network {
   id: NetworkID
 }
diff --git a/packages/neuron-wallet/tests/services/networks.test.ts b/packages/neuron-wallet/tests/services/networks.test.ts
index 91edf45b04..aebaa2a560 100644
--- a/packages/neuron-wallet/tests/services/networks.test.ts
+++ b/packages/neuron-wallet/tests/services/networks.test.ts
@@ -1,6 +1,5 @@
 import NetworksService from '../../src/services/networks'
 import { NetworkWithID } from '../../src/types/network'
-import env from '../../src/env'
 import i18n from '../../src/utils/i18n'
 
 const ERROR_MESSAGE = {
@@ -9,23 +8,19 @@ const ERROR_MESSAGE = {
   NETWORK_ID_NOT_FOUND: `messages.network-not-found`,
 }
 
-const {
-  presetNetworks: { current, list },
-} = env
-const [testnetNetwork, localNetwork] = list
-
 describe(`Unit tests of networks service`, () => {
   const newNetwork: NetworkWithID = {
     name: `new network`,
-    remote: `http://new-network.localhost.com`,
+    remote: `http://localhost:8114`,
     type: 0,
+    genesisHash: '',
     id: '',
     chain: '',
   }
 
   const newNetworkWithDefaultTypeOf1 = {
     name: `new network with the default type of 1`,
-    remote: `http://test.localhost.com`,
+    remote: `http://localhost:8114`,
     id: '',
   }
 
@@ -52,7 +47,8 @@ describe(`Unit tests of networks service`, () => {
 
     it(`has preset networks`, async () => {
       const networks = await service.getAll()
-      expect(networks).toEqual(list)
+      expect(networks.length).toBe(1)
+      expect(networks[0].id).toEqual('mainnet')
     })
 
     it(`get the default network`, async () => {
@@ -60,20 +56,9 @@ describe(`Unit tests of networks service`, () => {
       expect(network && network.type).toBe(0)
     })
 
-    it(`testnet should be type of default network`, async () => {
-      const defaultNetwork = await service.defaultOne()
-      expect(defaultNetwork).toEqual(testnetNetwork)
-    })
-
-    it(`testnet should be the current one by default`, async () => {
+    it(`mainnet should be the current one by default`, async () => {
       const currentNetworkID = await service.getCurrentID()
-      expect(currentNetworkID).toBe(current)
-      expect(currentNetworkID).toBe(testnetNetwork.id)
-    })
-
-    it(`get network by id ${current}`, async () => {
-      const currentNetwork = await service.get(current)
-      expect(currentNetwork).toEqual(list.find(network => network.id === current))
+      expect(currentNetworkID).toBe('mainnet')
     })
 
     it(`getting a non-exsiting network should return null`, async () => {
@@ -94,35 +79,31 @@ describe(`Unit tests of networks service`, () => {
       expect(res.type).toBe(1)
     })
 
-    it(`update the local networks's name`, async () => {
-      const name = `new local network name`
-      await service.update(localNetwork.id, { name })
-      const network = await service.get(localNetwork.id)
-      expect(network && network.name).toBe(name)
-    })
-
-    it(`update the local network address`, async () => {
-      const addr = `http://updated-address.com`
-      await service.update(localNetwork.id, { remote: addr })
-      const network = await service.get(localNetwork.id)
-      expect(network && network.remote).toBe(addr)
+    it(`update the networks's name`, async () => {
+      const network = await service.create(newNetworkWithDefaultTypeOf1.name, newNetworkWithDefaultTypeOf1.remote)
+      const name = `new network name`
+      await service.update(network.id, { name })
+      const updated = await service.get(network.id)
+      expect(updated && updated.name).toBe(name)
     })
 
-    it(`update the local network type to 1`, async () => {
-      const type = 1
-      await service.update(localNetwork.id, { type })
-      const network = await service.get(localNetwork.id)
-      expect(network && network.type).toBe(type)
+    it(`update the network' address`, async () => {
+      const network = await service.create(newNetworkWithDefaultTypeOf1.name, newNetworkWithDefaultTypeOf1.remote)
+      const address = `http://localhost:8115`
+      await service.update(network.id, { remote: address })
+      const updated = await service.get(network.id)
+      expect(updated && updated.remote).toBe(address)
     })
 
-    it(`set the local network to be the current one`, async () => {
-      await service.activate(localNetwork.id)
+    it(`set the network to be the current one`, async () => {
+      const network = await service.create(newNetworkWithDefaultTypeOf1.name, newNetworkWithDefaultTypeOf1.remote)
+      await service.activate(network.id)
       const currentNetworkID = await service.getCurrentID()
-      expect(currentNetworkID).toBe(localNetwork.id)
+      expect(currentNetworkID).toBe(network.id)
     })
 
     it(`delete an inactive network`, async () => {
-      const inactiveNetwork = localNetwork
+      const inactiveNetwork = await service.create(newNetworkWithDefaultTypeOf1.name, newNetworkWithDefaultTypeOf1.remote)
       const prevCurrentID = (await service.getCurrentID()) || ''
       const prevNetworks = await service.getAll()
       await service.delete(inactiveNetwork.id)
@@ -134,12 +115,13 @@ describe(`Unit tests of networks service`, () => {
       expect(currentID).toBe(prevCurrentID)
     })
 
-    it(`activate the local network and delete it, the current networks should switch to the testnet network`, async () => {
-      await service.activate(localNetwork.id)
+    it(`activate a network and delete it, the current networks should switch to the default network`, async () => {
+      const network = await service.create(newNetworkWithDefaultTypeOf1.name, newNetworkWithDefaultTypeOf1.remote)
+      await service.activate(network.id)
       const prevCurrentID = await service.getCurrentID()
       const prevNetworks = await service.getAll()
-      expect(prevCurrentID).toBe(localNetwork.id)
-      expect(prevNetworks.map(n => n.id)).toEqual(list.map(n => n.id))
+      expect(prevCurrentID).toBe(network.id)
+      expect(prevNetworks.map(n => n.id)).toEqual(['Mainnet', network.id])
       await service.delete(prevCurrentID || '')
       const currentNetworks = await service.getAll()
       expect(currentNetworks.map(n => n.id)).toEqual(prevNetworks.filter(n => n.id !== prevCurrentID).map(n => n.id))
@@ -148,16 +130,16 @@ describe(`Unit tests of networks service`, () => {
           service.getCurrentID().then(cID => resolve(cID))
         }, 500)
       })
-      expect(currentID).toBe(testnetNetwork.id)
+      expect(currentID).toBe('mainnet')
     })
 
     it(`reset the netowrks`, async () => {
       await service.create(newNetwork.name, newNetwork.remote)
       const newNetworkList = await service.getAll()
-      expect(newNetworkList.length).toBe(list.length + 1)
+      expect(newNetworkList.length).toBe(2)
       service.clear()
       const networks = await service.getAll()
-      expect(networks.length).toBe(list.length)
+      expect(networks.length).toBe(1)
     })
   })
 
@@ -192,8 +174,8 @@ describe(`Unit tests of networks service`, () => {
   })
 
   describe(`validation on network existence`, () => {
-    it(`create network with existing name of ${list[0].name}`, () => {
-      expect(service.create(list[0].name, list[0].remote)).rejects.toThrowError(i18n.t(ERROR_MESSAGE.NAME_USED))
+    it(`create network with existing name of Mainnet`, () => {
+      expect(service.create('Mainnet', 'http://localhost:8114')).rejects.toThrowError(i18n.t(ERROR_MESSAGE.NAME_USED))
     })
 
     it(`update network which is not existing`, () => {