diff --git a/projects/message-passing/src/main.rs b/projects/message-passing/src/main.rs
index 1124d7e..f3ad817 100644
--- a/projects/message-passing/src/main.rs
+++ b/projects/message-passing/src/main.rs
@@ -16,7 +16,7 @@ fn main() {
 
         for val in vals {
             tx1.send(val).unwrap();
-            thread::sleep(Duration::from_secs(1));
+            thread::sleep(Duration::from_millis(500));
         }
     });
 
diff --git a/src/SUMMARY.md b/src/SUMMARY.md
index af461bb..ddf0e06 100644
--- a/src/SUMMARY.md
+++ b/src/SUMMARY.md
@@ -100,7 +100,7 @@
 
 - [无惧并发](Ch16_Fearless_Concurrency.md)
     - [使用线程同步运行代码](concurrency/threads.md)
-    - [使用消息传递在线程间传输数据](concurrency/message_passing.md)
+    - [通过消息传递在线程间传输数据](concurrency/message_passing.md)
     - [共用状态的并发](concurrency/shared-state.md)
     - [使用 `Sync` 与 `Send` 的可扩展并发](concurrency/extensible_concurrency.md)