diff --git a/Timestamp-Synchronization.md b/Timestamp-Synchronization.md
index b4dbe35..f3cac90 100644
--- a/Timestamp-Synchronization.md
+++ b/Timestamp-Synchronization.md
@@ -46,7 +46,7 @@ Connect Livox LiDAR/Hub normally without additional wiring.
 
 ### 2.1.2 Attention
 
-Network environments with multiple master clocks are not supported. For the construction of master clock, please refer to Appendix [3.1 Set Up PTP Master Clock](#3.1 Set Up PTP Master Clock).
+Network environments with multiple master clocks are not supported. For the construction of master clock, please refer to Appendix [3.1 Set Up PTP Master Clock](#Appendix).
 
 ### 2.1.3 Accuracy
 
@@ -178,9 +178,9 @@ LiDAR_time_last = LiDAR_time;
 
 1 microsecond
 
-# 3 Appendix
+# Appendix
 
-## 3.1 Set Up PTP Master Clock
+## Set Up PTP Master Clock
 
 Address: [http://linuxptp.sourceforge.net](http://linuxptp.sourceforge.net)