diff --git a/API_Reference.py b/API_Reference.py
index 127205c..f486812 100644
--- a/API_Reference.py
+++ b/API_Reference.py
@@ -329,10 +329,12 @@ new_array = guan.find_close_values_in_one_array(array, precision=1e-2)
 
 degenerate_k_array, degenerate_eigenvalue_array = guan.find_degenerate_points(k_array, eigenvalue_array, precision=1e-2)
 
-guan.change_directory_by_replacement(current_key_word='code', new_key_word='data')
-
 guan.batch_reading_and_plotting(directory, xlabel='x', ylabel='y')
 
+guan.move_all_files_to_root_directory(directory)
+
+guan.change_directory_by_replacement(current_key_word='code', new_key_word='data')
+
 hex = guan.rgb_to_hex(rgb, pound=1)
 
 rgb = guan.hex_to_rgb(hex)
diff --git a/PyPI/setup.cfg b/PyPI/setup.cfg
index e6fe788..ac0d475 100644
--- a/PyPI/setup.cfg
+++ b/PyPI/setup.cfg
@@ -1,7 +1,7 @@
 [metadata]
 # replace with your username:
 name = guan
-version = 0.0.127
+version = 0.0.128
 author = guanjihuan
 author_email = guanjihuan@163.com
 description = An open source python package
diff --git a/PyPI/src/guan.egg-info/PKG-INFO b/PyPI/src/guan.egg-info/PKG-INFO
index d4a9369..c9992b0 100644
--- a/PyPI/src/guan.egg-info/PKG-INFO
+++ b/PyPI/src/guan.egg-info/PKG-INFO
@@ -1,6 +1,6 @@
 Metadata-Version: 2.1
 Name: guan
-Version: 0.0.127
+Version: 0.0.128
 Summary: An open source python package
 Home-page: https://py.guanjihuan.com
 Author: guanjihuan
diff --git a/PyPI/src/guan/__init__.py b/PyPI/src/guan/__init__.py
index 9bf8889..31a6e21 100644
--- a/PyPI/src/guan/__init__.py
+++ b/PyPI/src/guan/__init__.py
@@ -2,7 +2,7 @@
 
 # With this package, you can calculate band structures, density of states, quantum transport and topological invariant of tight-binding models by invoking the functions you need. Other frequently used functions are also integrated in this package, such as file reading/writing, figure plotting, data processing.
 
-# The current version is guan-0.0.127, updated on August 28, 2022.
+# The current version is guan-0.0.128, updated on September 07, 2022.
 
 # Installation: pip install --upgrade guan
 
@@ -2528,15 +2528,6 @@ def find_degenerate_points(k_array, eigenvalue_array, precision=1e-2):
         i0 += 1
     return degenerate_k_array, degenerate_eigenvalue_array
 
-def change_directory_by_replacement(current_key_word='code', new_key_word='data'):
-    import os
-    code_path = os.getcwd()
-    data_path = code_path.replace('\\', '/') 
-    data_path = data_path.replace(current_key_word, new_key_word) 
-    if os.path.exists(data_path) == False:
-        os.makedirs(data_path)
-    os.chdir(data_path)
-
 def batch_reading_and_plotting(directory, xlabel='x', ylabel='y'):
     import re
     import os
@@ -2547,6 +2538,28 @@ def batch_reading_and_plotting(directory, xlabel='x', ylabel='y'):
                 x_array, y_array = guan.read_one_dimensional_data(filename=filename)
                 guan.plot(x_array, y_array, xlabel=xlabel, ylabel=ylabel, title=filename, show=0, save=1, filename=filename)
 
+def move_all_files_to_root_directory(directory):
+    import os
+    import shutil
+    for root, dirs, files in os.walk(directory):
+        for i0 in range(len(files)):
+            shutil.move(root+'/'+files[i0], directory+'/'+files[i0])
+    for i0 in range(100):
+        for root, dirs, files in os.walk(directory):
+            try:
+                os.rmdir(root) 
+            except:
+                pass
+
+def change_directory_by_replacement(current_key_word='code', new_key_word='data'):
+    import os
+    code_path = os.getcwd()
+    data_path = code_path.replace('\\', '/') 
+    data_path = data_path.replace(current_key_word, new_key_word) 
+    if os.path.exists(data_path) == False:
+        os.makedirs(data_path)
+    os.chdir(data_path)
+
 def rgb_to_hex(rgb, pound=1):
     if pound==0:
         return '%02x%02x%02x' % rgb