diff --git a/src/api/ing/mod.rs b/src/api/ing/mod.rs
index 8ce9d47..56343b3 100644
--- a/src/api/ing/mod.rs
+++ b/src/api/ing/mod.rs
@@ -64,7 +64,7 @@ pub fn fmt_content(content: &str) -> String {
                 .expect("Invalid regexp");
     }
     REGEX.captures(content).map_or_else(
-        || content.to_string(),
+        || content.to_owned(),
         |caps| {
             let at_user = caps.get(1).expect("No capture at index 1").as_str();
             REGEX.replace(content, at_user).to_string()
@@ -78,7 +78,7 @@ pub fn rm_ing_at_user_tag(text: &str) -> String {
             Regex::new(r#"<a.*href="https://home.cnblogs.com/u/.*?".*>(@.*?)</a>："#)
                 .expect("Invalid regexp");
     }
-    REGEX.replace(text, "".to_string()).to_string()
+    REGEX.replace(text, "").to_string()
 }
 
 pub fn get_ing_at_user_tag_text(text: &str) -> String {
@@ -87,13 +87,10 @@ pub fn get_ing_at_user_tag_text(text: &str) -> String {
             Regex::new(r#"<a.*href="https://home.cnblogs.com/u/.*?".*>@(.*?)</a>："#)
                 .expect("Invalid regexp");
     }
-    REGEX.captures(text).map_or_else(
-        || "".to_string(),
-        |caps| {
-            caps.get(1)
-                .expect("No capture at index 1")
-                .as_str()
-                .to_string()
-        },
-    )
+    REGEX.captures(text).map_or_else(String::new, |caps| {
+        caps.get(1)
+            .expect("No capture at index 1")
+            .as_str()
+            .to_string()
+    })
 }
diff --git a/src/infra/http.rs b/src/infra/http.rs
index dbc54ae..16ec4d2 100644
--- a/src/infra/http.rs
+++ b/src/infra/http.rs
@@ -45,7 +45,7 @@ impl<K: ToString, V: ToString> VecExt for Vec<(K, V)> {
                 let s_v = v.to_string();
                 format!("{}={}", s_k, s_v)
             })
-            .fold("".to_string(), |acc, q| format!("{acc}&{q}"))
+            .fold(String::new(), |acc, q| format!("{acc}&{q}"))
     }
 }
 
diff --git a/src/main.rs b/src/main.rs
index 568fccc..ab9f186 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -54,7 +54,7 @@ fn panic_if_err<T>(result: &Result<T>) {
 #[tokio::main(flavor = "multi_thread")]
 async fn main() -> Result<()> {
     let args_vec = env::args().collect::<Vec<_>>();
-    if args_vec.iter().any(eq(&"--debug".to_string())) {
+    if args_vec.iter().any(eq(&"--debug".to_owned())) {
         dbg!(args_vec);
     }