diff --git a/easytier-gui/src-tauri/src/main.rs b/easytier-gui/src-tauri/src/main.rs
index 6ce7ce36..867bfe19 100644
--- a/easytier-gui/src-tauri/src/main.rs
+++ b/easytier-gui/src-tauri/src/main.rs
@@ -235,15 +235,13 @@ static INSTANCE_MAP: once_cell::sync::Lazy<DashMap<String, NetworkInstance>> =
 
 // Learn more about Tauri commands at https://tauri.app/v1/guides/features/command
 #[tauri::command]
-fn parse_network_config(cfg: &str) -> Result<String, String> {
-    let cfg: NetworkConfig = serde_json::from_str(cfg).map_err(|e| e.to_string())?;
+fn parse_network_config(cfg: NetworkConfig) -> Result<String, String> {
     let toml = cfg.gen_config().map_err(|e| e.to_string())?;
     Ok(toml.dump())
 }
 
 #[tauri::command]
-fn run_network_instance(cfg: &str) -> Result<String, String> {
-    let cfg: NetworkConfig = serde_json::from_str(cfg).map_err(|e| e.to_string())?;
+fn run_network_instance(cfg: NetworkConfig) -> Result<(), String> {
     if INSTANCE_MAP.contains_key(&cfg.instance_id) {
         return Err("instance already exists".to_string());
     }
@@ -254,13 +252,11 @@ fn run_network_instance(cfg: &str) -> Result<String, String> {
 
     println!("instance {} started", instance_id);
     INSTANCE_MAP.insert(instance_id, instance);
-    Ok("".to_string())
+    Ok(())
 }
 
 #[tauri::command]
-fn retain_network_instance(instance_ids: &str) -> Result<(), String> {
-    let instance_ids: Vec<String> =
-        serde_json::from_str(instance_ids).map_err(|e| e.to_string())?;
+fn retain_network_instance(instance_ids: Vec<String>) -> Result<(), String> {
     let _ = INSTANCE_MAP.retain(|k, _| instance_ids.contains(k));
     println!(
         "instance {:?} retained",
@@ -273,14 +269,14 @@ fn retain_network_instance(instance_ids: &str) -> Result<(), String> {
 }
 
 #[tauri::command]
-fn collect_network_infos() -> Result<String, String> {
+fn collect_network_infos() -> Result<BTreeMap<String, NetworkInstanceRunningInfo>, String> {
     let mut ret = BTreeMap::new();
     for instance in INSTANCE_MAP.iter() {
         if let Some(info) = instance.get_running_info() {
             ret.insert(instance.key().clone(), info);
         }
     }
-    Ok(serde_json::to_string(&ret).map_err(|e| e.to_string())?)
+    Ok(ret)
 }
 
 #[tauri::command]
diff --git a/easytier-gui/src/components/Status.vue b/easytier-gui/src/components/Status.vue
index fb80166a..651e54ea 100644
--- a/easytier-gui/src/components/Status.vue
+++ b/easytier-gui/src/components/Status.vue
@@ -1,4 +1,6 @@
 <script setup lang="ts">
+import type { NodeInfo } from '~/types/network'
+
 const props = defineProps<{
   instanceId?: string
 }>()
@@ -92,7 +94,7 @@ function lossRate(info: any) {
 
 const myNodeInfo = computed(() => {
   if (!curNetworkInst.value)
-    return {}
+    return {} as NodeInfo
 
   return curNetworkInst.value.detail?.my_node_info
 })
@@ -233,7 +235,7 @@ onUnmounted(() => {
 })
 
 const dialogVisible = ref(false)
-const dialogContent = ref('')
+const dialogContent = ref<any>('')
 
 function showVpnPortalConfig() {
   const my_node_info = myNodeInfo.value
diff --git a/easytier-gui/src/composables/network.ts b/easytier-gui/src/composables/network.ts
index 7314803d..7dbbd2d9 100644
--- a/easytier-gui/src/composables/network.ts
+++ b/easytier-gui/src/composables/network.ts
@@ -1,26 +1,22 @@
 import { invoke } from '@tauri-apps/api/tauri'
-import type { NetworkConfig } from '~/types/network'
+import type { NetworkConfig, NetworkInstanceRunningInfo } from '~/types/network'
 
-export async function parseNetworkConfig(cfg: NetworkConfig): Promise<string> {
-  const ret: string = await invoke('parse_network_config', { cfg: JSON.stringify(cfg) })
-  return ret
+export async function parseNetworkConfig(cfg: NetworkConfig) {
+  return invoke<string>('parse_network_config', { cfg })
 }
 
 export async function runNetworkInstance(cfg: NetworkConfig) {
-  const ret: string = await invoke('run_network_instance', { cfg: JSON.stringify(cfg) })
-  return ret
+  return invoke('run_network_instance', { cfg })
 }
 
-export async function retainNetworkInstance(instanceIds: Array<string>) {
-  const ret: string = await invoke('retain_network_instance', { instanceIds: JSON.stringify(instanceIds) })
-  return ret
+export async function retainNetworkInstance(instanceIds: string[]) {
+  return invoke('retain_network_instance', { instanceIds })
 }
 
 export async function collectNetworkInfos() {
-  const ret: string = await invoke('collect_network_infos', {})
-  return JSON.parse(ret)
+  return await invoke<Record<string, NetworkInstanceRunningInfo>>('collect_network_infos')
 }
 
-export async function getOsHostname(): Promise<string> {
-  return await invoke('get_os_hostname')
-}
\ No newline at end of file
+export async function getOsHostname() {
+  return await invoke<string>('get_os_hostname')
+}
diff --git a/easytier-gui/src/stores/network.ts b/easytier-gui/src/stores/network.ts
index 2dc2885f..a89c2912 100644
--- a/easytier-gui/src/stores/network.ts
+++ b/easytier-gui/src/stores/network.ts
@@ -1,4 +1,4 @@
-import type { NetworkConfig, NetworkInstance } from '~/types/network'
+import type { NetworkConfig, NetworkInstance, NetworkInstanceRunningInfo } from '~/types/network'
 import { DEFAULT_NETWORK_CONFIG } from '~/types/network'
 
 export const useNetworkStore = defineStore('networkStore', {
@@ -13,7 +13,7 @@ export const useNetworkStore = defineStore('networkStore', {
       // uuid -> instance
       instances: {} as Record<string, NetworkInstance>,
 
-      networkInfos: {} as Record<string, any>,
+      networkInfos: {} as Record<string, NetworkInstanceRunningInfo>,
     }
   },
 
@@ -56,35 +56,36 @@ export const useNetworkStore = defineStore('networkStore', {
         instance_id: instanceId,
         running: false,
         error_msg: '',
-        detail: {},
+        detail: {} as NetworkInstanceRunningInfo,
       }
     },
 
-    updateWithNetworkInfos(networkInfos: Record<string, any>) {
+    updateWithNetworkInfos(networkInfos: Record<string, NetworkInstanceRunningInfo>) {
       this.networkInfos = networkInfos
       for (const [instanceId, info] of Object.entries(networkInfos)) {
         if (this.instances[instanceId] === undefined)
           this.addNetworkInstance(instanceId)
 
         this.instances[instanceId].running = info.running
-        this.instances[instanceId].error_msg = info.error_msg
+        this.instances[instanceId].error_msg = info.error_msg || ''
         this.instances[instanceId].detail = info
       }
     },
 
     loadFromLocalStorage() {
-      const networkList = JSON.parse(localStorage.getItem('networkList') || '[]')
-      const result = []
-      for (const cfg of networkList) {
-        result.push({
-          ...DEFAULT_NETWORK_CONFIG,
-          ...cfg,
+      let networkList: NetworkConfig[]
+
+      try {
+        networkList = JSON.parse(localStorage.getItem('networkList') || '[]')
+        networkList = networkList.map((cfg) => {
+          return { ...DEFAULT_NETWORK_CONFIG(), ...cfg } as NetworkConfig
         })
       }
-      if (result.length === 0)
-        result.push(DEFAULT_NETWORK_CONFIG)
+      catch {
+        networkList = [DEFAULT_NETWORK_CONFIG()]
+      }
 
-      this.networkList = result
+      this.networkList = networkList
       this.curNetwork = this.networkList[0]
     },
 
diff --git a/easytier-gui/src/types/network.ts b/easytier-gui/src/types/network.ts
index 9b664903..6130cdad 100644
--- a/easytier-gui/src/types/network.ts
+++ b/easytier-gui/src/types/network.ts
@@ -69,5 +69,92 @@ export interface NetworkInstance {
   running: boolean
   error_msg: string
 
-  detail: any
+  detail: NetworkInstanceRunningInfo
+}
+
+export interface NetworkInstanceRunningInfo {
+  my_node_info: NodeInfo
+  events: Record<string, any>
+  node_info: NodeInfo
+  routes: Route[]
+  peers: PeerInfo[]
+  peer_route_pairs: PeerRoutePair[]
+  running: boolean
+  error_msg?: string
+}
+
+export interface NodeInfo {
+  virtual_ipv4: string
+  ips: {
+    public_ipv4: string
+    interface_ipv4s: string[]
+    public_ipv6: string
+    interface_ipv6s: string[]
+    listeners: {
+      serialization: string
+      scheme_end: number
+      username_end: number
+      host_start: number
+      host_end: number
+      host: any
+      port?: number
+      path_start: number
+      query_start?: number
+      fragment_start?: number
+    }[]
+  }
+  stun_info: StunInfo
+  listeners: string[]
+  vpn_portal_cfg?: string
+}
+
+export interface StunInfo {
+  udp_nat_type: number
+  tcp_nat_type: number
+  last_update_time: number
+}
+
+export interface Route {
+  peer_id: number
+  ipv4_addr: string
+  next_hop_peer_id: number
+  cost: number
+  proxy_cidrs: string[]
+  hostname: string
+  stun_info?: StunInfo
+  inst_id: string
+}
+
+export interface PeerInfo {
+  peer_id: number
+  conns: PeerConnInfo[]
+}
+
+export interface PeerConnInfo {
+  conn_id: string
+  my_peer_id: number
+  peer_id: number
+  features: string[]
+  tunnel?: TunnelInfo
+  stats?: PeerConnStats
+  loss_rate: number
+}
+
+export interface PeerRoutePair {
+  route: Route
+  peer?: PeerInfo
+}
+
+export interface TunnelInfo {
+  tunnel_type: string
+  local_addr: string
+  remote_addr: string
+}
+
+export interface PeerConnStats {
+  rx_bytes: number
+  tx_bytes: number
+  rx_packets: number
+  tx_packets: number
+  latency_us: number
 }