diff --git a/src-tauri/src/cmds/profile.rs b/src-tauri/src/cmds/profile.rs
index 26d672c..9278151 100644
--- a/src-tauri/src/cmds/profile.rs
+++ b/src-tauri/src/cmds/profile.rs
@@ -1,7 +1,12 @@
 use crate::{
-  config::{read_profiles, save_profiles, ProfileItem, ProfilesConfig},
+  config::{ProfileItem, ProfilesConfig},
   events::state::{ClashInfoState, ProfileLock},
-  utils::{app_home_dir, clash::put_clash_profile, fetch::fetch_profile},
+  utils::{
+    app_home_dir,
+    clash::put_clash_profile,
+    config::{read_profiles, save_profiles},
+    fetch::fetch_profile,
+  },
 };
 use std::fs::File;
 use std::io::Write;
@@ -164,7 +169,7 @@ pub async fn put_profiles(
     return Err(format!("the index out of bound"));
   }
 
-  profiles.current = Some(current as u32);
+  profiles.current = Some(current);
   match save_profiles(&profiles) {
     Ok(_) => put_clash_profile(&clash_info).await,
     Err(err) => Err(err),
diff --git a/src-tauri/src/config/mod.rs b/src-tauri/src/config/mod.rs
index 372723a..1cf8f1e 100644
--- a/src-tauri/src/config/mod.rs
+++ b/src-tauri/src/config/mod.rs
@@ -1,9 +1,7 @@
 mod clash;
-mod operate;
 mod profiles;
 mod verge;
 
 pub use self::clash::*;
-pub use self::operate::*;
 pub use self::profiles::*;
 pub use self::verge::*;
diff --git a/src-tauri/src/config/profiles.rs b/src-tauri/src/config/profiles.rs
index 65df3d1..0ad49cf 100644
--- a/src-tauri/src/config/profiles.rs
+++ b/src-tauri/src/config/profiles.rs
@@ -4,7 +4,7 @@ use serde::{Deserialize, Serialize};
 #[derive(Default, Debug, Clone, Deserialize, Serialize)]
 pub struct ProfilesConfig {
   /// current profile's name
-  pub current: Option<u32>,
+  pub current: Option<usize>,
 
   /// profile list
   pub items: Option<Vec<ProfileItem>>,
@@ -34,10 +34,10 @@ pub struct ProfileSelected {
 
 #[derive(Default, Debug, Clone, Copy, Deserialize, Serialize)]
 pub struct ProfileExtra {
-  pub upload: u64,
-  pub download: u64,
-  pub total: u64,
-  pub expire: u64,
+  pub upload: usize,
+  pub download: usize,
+  pub total: usize,
+  pub expire: usize,
 }
 
 #[derive(Default, Debug, Clone, Deserialize, Serialize)]
diff --git a/src-tauri/src/utils/clash.rs b/src-tauri/src/utils/clash.rs
index e216bc6..cc3148e 100644
--- a/src-tauri/src/utils/clash.rs
+++ b/src-tauri/src/utils/clash.rs
@@ -1,9 +1,11 @@
 extern crate log;
 
 use crate::{
-  config::{read_clash_controller, read_profiles},
   events::emit::{clash_start, ClashInfoPayload},
-  utils::app_home_dir,
+  utils::{
+    app_home_dir,
+    config::{read_clash_controller, read_profiles},
+  },
 };
 use reqwest::header::HeaderMap;
 use std::{collections::HashMap, env::temp_dir, fs};
@@ -67,7 +69,7 @@ pub fn run_clash_bin(app_handle: &AppHandle) -> ClashInfoPayload {
 pub async fn put_clash_profile(payload: &ClashInfoPayload) -> Result<(), String> {
   let profile = {
     let profiles = read_profiles();
-    let current = profiles.current.unwrap_or(0u32) as usize;
+    let current = profiles.current.unwrap_or(0) as usize;
     match profiles.items {
       Some(items) => {
         if items.len() == 0 {
diff --git a/src-tauri/src/config/operate.rs b/src-tauri/src/utils/config.rs
similarity index 94%
rename from src-tauri/src/config/operate.rs
rename to src-tauri/src/utils/config.rs
index b060fd5..9569f2c 100644
--- a/src-tauri/src/config/operate.rs
+++ b/src-tauri/src/utils/config.rs
@@ -1,10 +1,11 @@
+use crate::{
+  config::{ClashController, ProfilesConfig},
+  utils::app_home_dir,
+};
 use serde::{de::DeserializeOwned, Serialize};
 use serde_yaml::{Mapping, Value};
 use std::{fs, path::PathBuf};
 
-use super::{profiles::ProfilesConfig, ClashController};
-use crate::utils::app_home_dir;
-
 /// read data from yaml as struct T
 pub fn read_yaml<T: DeserializeOwned>(path: PathBuf) -> T {
   let yaml_str = fs::read_to_string(path).unwrap();
@@ -106,8 +107,3 @@ pub fn save_profiles(profiles: &ProfilesConfig) -> Result<(), String> {
     Some("# Profiles Config for Clash Verge\n\n"),
   )
 }
-
-#[test]
-fn test_print_config() {
-  println!("{:?}", read_clash_controller());
-}
diff --git a/src-tauri/src/utils/fetch.rs b/src-tauri/src/utils/fetch.rs
index fc58e23..043967e 100644
--- a/src-tauri/src/utils/fetch.rs
+++ b/src-tauri/src/utils/fetch.rs
@@ -1,15 +1,21 @@
 use crate::config::{ProfileExtra, ProfileResponse};
-use std::time::{SystemTime, UNIX_EPOCH};
+use std::{
+  str::FromStr,
+  time::{SystemTime, UNIX_EPOCH},
+};
 
 /// parse the string
-fn parse_string<'a>(target: &'a str, key: &'a str) -> Option<&'a str> {
+fn parse_string<T: FromStr>(target: &str, key: &str) -> Option<T> {
   match target.find(key) {
     Some(idx) => {
       let idx = idx + key.len();
       let value = &target[idx..];
-      match value.split(';').nth(0) {
-        Some(value) => Some(value.trim()),
-        None => Some(value.trim()),
+      match match value.split(';').nth(0) {
+        Some(value) => value.trim().parse(),
+        None => value.trim().parse(),
+      } {
+        Ok(r) => Some(r),
+        Err(_) => None,
       }
     }
     None => None,
@@ -33,22 +39,10 @@ pub async fn fetch_profile(url: &str) -> Option<ProfileResponse> {
       .unwrap();
 
     ProfileExtra {
-      upload: parse_string(sub_info, "upload=")
-        .unwrap_or("0")
-        .parse()
-        .unwrap_or(0u64),
-      download: parse_string(sub_info, "download=")
-        .unwrap_or("0")
-        .parse()
-        .unwrap_or(0u64),
-      total: parse_string(sub_info, "total=")
-        .unwrap_or("0")
-        .parse()
-        .unwrap_or(0u64),
-      expire: parse_string(sub_info, "expire=")
-        .unwrap_or("0")
-        .parse()
-        .unwrap_or(0u64),
+      upload: parse_string(sub_info, "upload=").unwrap_or(0),
+      download: parse_string(sub_info, "download=").unwrap_or(0),
+      total: parse_string(sub_info, "total=").unwrap_or(0),
+      expire: parse_string(sub_info, "expire=").unwrap_or(0),
     }
   };
 
@@ -60,10 +54,10 @@ pub async fn fetch_profile(url: &str) -> Option<ProfileResponse> {
       .as_secs();
     let file = format!("{}.yaml", now);
     let name = header.get("Content-Disposition").unwrap().to_str().unwrap();
-    let name = parse_string(name, "filename=");
+    let name = parse_string::<String>(name, "filename=");
 
     match name {
-      Some(f) => (f.to_string(), file),
+      Some(f) => (f, file),
       None => (file.clone(), file),
     }
   };
@@ -87,14 +81,17 @@ fn test_parse_value() {
   let test_1 = "upload=111; download=2222; total=3333; expire=444";
   let test_2 = "attachment; filename=Clash.yaml";
 
-  assert_eq!(parse_string(test_1, "upload="), Some("111"));
-  assert_eq!(parse_string(test_1, "download="), Some("2222"));
-  assert_eq!(parse_string(test_1, "total="), Some("3333"));
-  assert_eq!(parse_string(test_1, "expire="), Some("444"));
-  assert_eq!(parse_string(test_2, "filename="), Some("Clash.yaml"));
+  assert_eq!(parse_string::<usize>(test_1, "upload=").unwrap(), 111);
+  assert_eq!(parse_string::<usize>(test_1, "download=").unwrap(), 2222);
+  assert_eq!(parse_string::<usize>(test_1, "total=").unwrap(), 3333);
+  assert_eq!(parse_string::<usize>(test_1, "expire=").unwrap(), 444);
+  assert_eq!(
+    parse_string::<String>(test_2, "filename=").unwrap(),
+    format!("Clash.yaml")
+  );
 
-  assert_eq!(parse_string(test_1, "aaa="), None);
-  assert_eq!(parse_string(test_1, "upload1="), None);
-  assert_eq!(parse_string(test_1, "expire1="), None);
-  assert_eq!(parse_string(test_2, "attachment="), None);
+  assert_eq!(parse_string::<usize>(test_1, "aaa="), None);
+  assert_eq!(parse_string::<usize>(test_1, "upload1="), None);
+  assert_eq!(parse_string::<usize>(test_1, "expire1="), None);
+  assert_eq!(parse_string::<usize>(test_2, "attachment="), None);
 }
diff --git a/src-tauri/src/utils/mod.rs b/src-tauri/src/utils/mod.rs
index 047d7c9..0430f37 100644
--- a/src-tauri/src/utils/mod.rs
+++ b/src-tauri/src/utils/mod.rs
@@ -2,6 +2,7 @@ mod dirs;
 pub use self::dirs::*;
 
 pub mod clash;
+pub mod config;
 pub mod fetch;
 pub mod init;
 pub mod sysopt;