diff --git a/src/dingtalk.rs b/src/dingtalk.rs
index 7990e48..c530d15 100644
--- a/src/dingtalk.rs
+++ b/src/dingtalk.rs
@@ -18,8 +18,8 @@ pub struct InnerTextMessage {
 }
 
 pub fn send_dingtalk_message(cert_config: &CertConfig, message: &str) -> XResult<()> {
-    let dintalk_notify_token = get_dingtalk_notify_token(cert_config);
-    if let Some((access_token, sec_token)) = &dintalk_notify_token {
+    let dingtalk_notify_token = get_dingtalk_notify_token(cert_config);
+    if let Some((access_token, sec_token)) = &dingtalk_notify_token {
         inner_send_dingtalk_message(access_token, sec_token, message)?;
     }
     Ok(())
diff --git a/src/simple_thread_pool.rs b/src/simple_thread_pool.rs
index e28d8c8..1843a72 100644
--- a/src/simple_thread_pool.rs
+++ b/src/simple_thread_pool.rs
@@ -1,7 +1,6 @@
-use std::thread;
-use std::thread::JoinHandle;
-use std::sync::atomic::{AtomicU32, Ordering};
+use std::thread::{JoinHandle, spawn, sleep};
 use std::sync::Arc;
+use std::sync::atomic::{AtomicU32, Ordering};
 use std::time::Duration;
 use rust_util::XResult;
 
@@ -28,7 +27,7 @@ impl SimpleThreadPool {
         let running = self.running_pool_size.fetch_add(1, Ordering::SeqCst);
         let running_pool_size_clone = self.running_pool_size.clone();
         if running < self.max_pool_size {
-            Some(thread::spawn(move || {
+            Some(spawn(move || {
                 f();
                 running_pool_size_clone.fetch_sub(1, Ordering::SeqCst);
             }))
@@ -47,7 +46,7 @@ fn test_simple_thread_pool() {
     for i in 1..10 {
         if let Some(h) = stp.submit(move || {
             println!("Task start: {}", i);
-            thread::sleep(Duration::from_secs(1));
+            sleep(Duration::from_secs(1));
             println!("Task end: {}", i);
         }) {
             handlers.push(h);