diff --git a/README.md b/README.md
index 4f9d2eb..9c36c80 100755
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 ## Guan package
 
-Guan is an open-source python package developed and maintained by https://www.guanjihuan.com/about (Ji-Huan Guan, 关济寰). 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.
+Guan is an open-source python package developed and maintained by https://www.guanjihuan.com/about (Ji-Huan Guan, 关济寰). 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 figure plotting, file-reading/writing, data processing, file processing.
 
 The primary location of this package is on website https://py.guanjihuan.com. 
 
@@ -23,11 +23,10 @@ import guan
 + density of states
 + quantum transport
 + topological invariant
-+ read and write
 + plot figures
++ read and write
 + data processing
-+ others
-
++ file processing
 
 ## About this package
 
diff --git a/Source_Code/PyPI/setup.cfg b/Source_Code/PyPI/setup.cfg
index 3d3c5fc..af08205 100644
--- a/Source_Code/PyPI/setup.cfg
+++ b/Source_Code/PyPI/setup.cfg
@@ -1,7 +1,7 @@
 [metadata]
 # replace with your username:
 name = guan
-version = 0.0.179
+version = 0.0.180
 author = guanjihuan
 author_email = guanjihuan@163.com
 description = An open source python package
diff --git a/Source_Code/PyPI/src/guan.egg-info/PKG-INFO b/Source_Code/PyPI/src/guan.egg-info/PKG-INFO
index 13c1d30..ad8ff50 100644
--- a/Source_Code/PyPI/src/guan.egg-info/PKG-INFO
+++ b/Source_Code/PyPI/src/guan.egg-info/PKG-INFO
@@ -1,6 +1,6 @@
 Metadata-Version: 2.1
 Name: guan
-Version: 0.0.179
+Version: 0.0.180
 Summary: An open source python package
 Home-page: https://py.guanjihuan.com
 Author: guanjihuan
diff --git a/Source_Code/PyPI/src/guan/__init__.py b/Source_Code/PyPI/src/guan/__init__.py
index 9a0ef42..fcbd96a 100644
--- a/Source_Code/PyPI/src/guan/__init__.py
+++ b/Source_Code/PyPI/src/guan/__init__.py
@@ -57,13 +57,11 @@
 
 # Module 1: basic functions
 
-## test
-
+# 测试
 def test():
     print('\nSuccess in the installation of Guan package!\n')
 
-## Pauli matrices
-
+# 泡利矩阵
 def sigma_0():
     import numpy as np
     return np.eye(2)
@@ -80,8 +78,7 @@ def sigma_z():
     import numpy as np
     return np.array([[1, 0],[0, -1]])
 
-## Kronecker product of Pauli matrices
-
+# 泡利矩阵的张量积
 def sigma_00():
     import numpy as np
     import guan
@@ -1568,8 +1565,6 @@ def local_density_of_states_for_square_lattice_with_self_energy_using_dyson_equa
 
 # Module 8: quantum transport
 
-## conductance
-
 # 计算电导
 def calculate_conductance(fermi_energy, h00, h01, length=100):
     import numpy as np
@@ -1773,8 +1768,6 @@ def calculate_conductance_with_scattering_length_array(fermi_energy, h00, h01, l
     conductance_array = conductance_array/calculation_times
     return conductance_array
 
-## multi-terminal transmission
-
 # 计算得到Gamma矩阵和格林函数，用于计算六端口的量子输运
 def get_gamma_array_and_green_for_six_terminal_transmission(fermi_energy, h00_for_lead_4, h01_for_lead_4, h00_for_lead_2, h01_for_lead_2, center_hamiltonian, width=10, length=50, internal_degree=1, moving_step_of_leads=10):
     import numpy as np
@@ -1857,8 +1850,6 @@ def calculate_six_terminal_transmissions_from_lead_1(fermi_energy, h00_for_lead_
     transmission_16 = np.real(np.trace(np.dot(np.dot(np.dot(gamma_array[0], green), gamma_array[5]), green.transpose().conj())))
     return transmission_12, transmission_13, transmission_14, transmission_15, transmission_16
 
-## scattering matrix
-
 # 通过动量k的虚部，判断通道为传播通道还是衰减通道
 def if_active_channel(k_of_channel):
     import numpy as np
@@ -3841,7 +3832,7 @@ def play_element_words(random_on=0, show_translation=1, show_link=1, translation
 
 
 
-# # Module 13: file processing
+# Module 13: file processing
 
 # 如果不存在文件夹，则新建文件夹
 def make_directory(directory='./test'):