diff --git a/Practical-Teaching/Professional-Comprehensive-Training-I/1.1.cpp b/Practical-Teaching/Professional-Comprehensive-Training-I/1.1.cpp
index 646a6d2..66be0a9 100644
--- a/Practical-Teaching/Professional-Comprehensive-Training-I/1.1.cpp
+++ b/Practical-Teaching/Professional-Comprehensive-Training-I/1.1.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2023 徐丞烨，王凯钦，宋析峰，杨崇新
+// Copyright (c) 2023 Xi Xu
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #include <bits/stdc++.h>
diff --git a/Practical-Teaching/Professional-Comprehensive-Training-I/1.2.cpp b/Practical-Teaching/Professional-Comprehensive-Training-I/1.2.cpp
index 6cfe3ce..bd70d83 100644
--- a/Practical-Teaching/Professional-Comprehensive-Training-I/1.2.cpp
+++ b/Practical-Teaching/Professional-Comprehensive-Training-I/1.2.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2023 徐丞烨，王凯钦，宋析峰，杨崇新
+// Copyright (c) 2023 Xi Xu
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #include <bits/stdc++.h>
diff --git a/Practical-Teaching/Professional-Comprehensive-Training-I/1.4.cpp b/Practical-Teaching/Professional-Comprehensive-Training-I/1.4.cpp
index b223a82..c155a2b 100644
--- a/Practical-Teaching/Professional-Comprehensive-Training-I/1.4.cpp
+++ b/Practical-Teaching/Professional-Comprehensive-Training-I/1.4.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2023 徐丞烨，王凯钦，宋析峰，杨崇新
+// Copyright (c) 2023 Xi Xu
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #include <bits/stdc++.h>
diff --git a/Practical-Teaching/Professional-Comprehensive-Training-I/2.1.cpp b/Practical-Teaching/Professional-Comprehensive-Training-I/2.1.cpp
index c4c2646..93ed715 100644
--- a/Practical-Teaching/Professional-Comprehensive-Training-I/2.1.cpp
+++ b/Practical-Teaching/Professional-Comprehensive-Training-I/2.1.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2023 徐丞烨，王凯钦，宋析峰，杨崇新
+// Copyright (c) 2023 Xi Xu
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #include <bits/stdc++.h>
diff --git a/Practical-Teaching/Professional-Comprehensive-Training-I/2.2.cpp b/Practical-Teaching/Professional-Comprehensive-Training-I/2.2.cpp
index aa44ca4..84b6371 100644
--- a/Practical-Teaching/Professional-Comprehensive-Training-I/2.2.cpp
+++ b/Practical-Teaching/Professional-Comprehensive-Training-I/2.2.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2023 徐丞烨，王凯钦，宋析峰，杨崇新
+// Copyright (c) 2023 Xi Xu
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #include <bits/stdc++.h>
diff --git a/Practical-Teaching/Professional-Comprehensive-Training-I/2.4.cpp b/Practical-Teaching/Professional-Comprehensive-Training-I/2.4.cpp
index 672b3f0..9ed2f42 100644
--- a/Practical-Teaching/Professional-Comprehensive-Training-I/2.4.cpp
+++ b/Practical-Teaching/Professional-Comprehensive-Training-I/2.4.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2023 徐丞烨，王凯钦，宋析峰，杨崇新
+// Copyright (c) 2023 Xi Xu
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #include <bits/stdc++.h>
diff --git a/Practical-Teaching/Professional-Comprehensive-Training-I/_2.3.cpp b/Practical-Teaching/Professional-Comprehensive-Training-I/_2.3.cpp
index 9ad5784..25ddd54 100644
--- a/Practical-Teaching/Professional-Comprehensive-Training-I/_2.3.cpp
+++ b/Practical-Teaching/Professional-Comprehensive-Training-I/_2.3.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2023 徐丞烨，王凯钦，宋析峰，杨崇新
+// Copyright (c) 2023 Xi Xu
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #include <bits/stdc++.h>