diff --git a/2020.06.01_parallel_calculations_with_python/application_of_parallel_calculations_with_python.py b/2020.06.01_parallel_calculations_with_python/application_of_parallel_calculations_with_python.py
index 2267f25..251b9d7 100644
--- a/2020.06.01_parallel_calculations_with_python/application_of_parallel_calculations_with_python.py
+++ b/2020.06.01_parallel_calculations_with_python/application_of_parallel_calculations_with_python.py
@@ -1,3 +1,8 @@
+"""
+This code is supported by the website: https://www.guanjihuan.com
+The newest version of this code is on the web page: https://www.guanjihuan.com/archives/4536
+"""
+
 from multiprocessing import Process
 import os
 import time
@@ -14,12 +19,12 @@ def main(parameter_array, task_index):
     guan.write_one_dimensional_data(parameter_array, result_array, filename='task_index='+str(task_index))
 
 if __name__ == '__main__':
-    cpus = 4
+    task_num = 4
     parameter_array_all = np.arange(0, 17, 1) 
     start_time = time.perf_counter()
     process_array = []
-    for task_index in range(cpus):
-        parameter_array = guan.preprocess_for_parallel_calculations(parameter_array_all, cpus, task_index)
+    for task_index in range(task_num):
+        parameter_array = guan.preprocess_for_parallel_calculations(parameter_array_all, task_num, task_index)
         process_array.append(Process(target=main, args=(parameter_array, task_index)))
     for process in process_array: # 运行子进程
         process.start()
@@ -28,7 +33,7 @@ if __name__ == '__main__':
     end_time = time.perf_counter()
     print('运行时间=', (end_time-start_time), '\n')
     f = open('result.txt', 'w')
-    for task_index in range(cpus):
+    for task_index in range(task_num):
         with open('task_index='+str(task_index)+'.txt', 'r') as f0:
             text = f0.read()
         f.write(text)
diff --git a/2020.06.01_parallel_calculations_with_python/parallel_calculations_with_python.py b/2020.06.01_parallel_calculations_with_python/parallel_calculations_with_python.py
index 15ee46b..60b03fe 100644
--- a/2020.06.01_parallel_calculations_with_python/parallel_calculations_with_python.py
+++ b/2020.06.01_parallel_calculations_with_python/parallel_calculations_with_python.py
@@ -1,3 +1,8 @@
+"""
+This code is supported by the website: https://www.guanjihuan.com
+The newest version of this code is on the web page: https://www.guanjihuan.com/archives/4536
+"""
+
 from multiprocessing import Process
 import os
 import time
diff --git a/2020.06.01_parallel_calculations_with_python/parallel_calculations_with_python_using_Value.py b/2020.06.01_parallel_calculations_with_python/parallel_calculations_with_python_using_Value.py
index be08ebe..ee92b15 100644
--- a/2020.06.01_parallel_calculations_with_python/parallel_calculations_with_python_using_Value.py
+++ b/2020.06.01_parallel_calculations_with_python/parallel_calculations_with_python_using_Value.py
@@ -1,3 +1,8 @@
+"""
+This code is supported by the website: https://www.guanjihuan.com
+The newest version of this code is on the web page: https://www.guanjihuan.com/archives/4536
+"""
+
 from multiprocessing import Process, Value
 
 def run_proc(name, a, num): # 要执行的代码
diff --git a/2024.01.16_GUAN_package_learning/example_of_array_division.py b/2024.01.16_GUAN_package_learning/example_of_array_division.py
index 6c81c05..53515c6 100644
--- a/2024.01.16_GUAN_package_learning/example_of_array_division.py
+++ b/2024.01.16_GUAN_package_learning/example_of_array_division.py
@@ -1,9 +1,9 @@
 # 数组分割示例
 import numpy as np
 import guan
-cpus = 4
+task_num = 4
 parameter_array_all = np.arange(0, 17, 1) 
-for task_index in range(cpus):
-    parameter_array = guan.preprocess_for_parallel_calculations(parameter_array_all, cpus, task_index)
+for task_index in range(task_num):
+    parameter_array = guan.preprocess_for_parallel_calculations(parameter_array_all, task_num, task_index)
     print(parameter_array)
     print()
\ No newline at end of file
diff --git a/2024.03.07_akshare_strategy/check_data.py b/2024.03.07_akshare_strategy/check_data.py
index d717167..266f614 100644
--- a/2024.03.07_akshare_strategy/check_data.py
+++ b/2024.03.07_akshare_strategy/check_data.py
@@ -1,3 +1,8 @@
+"""
+This code is supported by the website: https://www.guanjihuan.com
+The newest version of this code is on the web page: https://www.guanjihuan.com/archives/38912
+"""
+
 import guan
 
 stock_symbols_60, stock_symbols_00, stock_symbols_30, stock_symbols_68, \
diff --git a/2024.03.07_akshare_strategy/data_processing.py b/2024.03.07_akshare_strategy/data_processing.py
index 08f2dea..dfe0e5a 100644
--- a/2024.03.07_akshare_strategy/data_processing.py
+++ b/2024.03.07_akshare_strategy/data_processing.py
@@ -1,3 +1,8 @@
+"""
+This code is supported by the website: https://www.guanjihuan.com
+The newest version of this code is on the web page: https://www.guanjihuan.com/archives/38912
+"""
+
 import guan
 import numpy as np
 import datetime
diff --git a/2024.03.07_akshare_strategy/download_data.py b/2024.03.07_akshare_strategy/download_data.py
index 312604d..c671564 100644
--- a/2024.03.07_akshare_strategy/download_data.py
+++ b/2024.03.07_akshare_strategy/download_data.py
@@ -1,3 +1,8 @@
+"""
+This code is supported by the website: https://www.guanjihuan.com
+The newest version of this code is on the web page: https://www.guanjihuan.com/archives/38912
+"""
+
 import guan
 stock_symbols_60, stock_symbols_00, stock_symbols_30, stock_symbols_68, \
 stock_symbols_8_4,stock_symbols_others = guan.stock_symbols_classification()
diff --git a/2024.03.07_akshare_strategy/strategy.py b/2024.03.07_akshare_strategy/strategy.py
index 1e66e07..5b03a8b 100644
--- a/2024.03.07_akshare_strategy/strategy.py
+++ b/2024.03.07_akshare_strategy/strategy.py
@@ -1,3 +1,8 @@
+"""
+This code is supported by the website: https://www.guanjihuan.com
+The newest version of this code is on the web page: https://www.guanjihuan.com/archives/38912
+"""
+
 import guan
 file_list_60 = guan.get_all_filenames_in_directory(directory='./2018_01_01_to_2024_03_07/stock_data_60', \
                                         file_format=None, show_root_path=0, sort=1, include_subdirectory=1)
diff --git a/2024.04.01_PCA_example/PCA_and_StandardScaler_example.py b/2024.04.01_PCA_example/PCA_and_StandardScaler_example.py
index aaaf093..706d9f8 100644
--- a/2024.04.01_PCA_example/PCA_and_StandardScaler_example.py
+++ b/2024.04.01_PCA_example/PCA_and_StandardScaler_example.py
@@ -1,3 +1,8 @@
+"""
+This code is supported by the website: https://www.guanjihuan.com
+The newest version of this code is on the web page: https://www.guanjihuan.com/archives/39020
+"""
+
 import numpy as np
 from sklearn.decomposition import PCA
 
diff --git a/2024.04.01_PCA_example/PCA_example.py b/2024.04.01_PCA_example/PCA_example.py
index bcc1c58..d440086 100644
--- a/2024.04.01_PCA_example/PCA_example.py
+++ b/2024.04.01_PCA_example/PCA_example.py
@@ -1,3 +1,8 @@
+"""
+This code is supported by the website: https://www.guanjihuan.com
+The newest version of this code is on the web page: https://www.guanjihuan.com/archives/39020
+"""
+
 import numpy as np
 from sklearn.decomposition import PCA