diff --git a/2024.01.16_GUAN_package_learning/example_of_array_division.py b/2024.01.16_GUAN_package_learning/common/example_of_array_division.py
similarity index 92%
rename from 2024.01.16_GUAN_package_learning/example_of_array_division.py
rename to 2024.01.16_GUAN_package_learning/common/example_of_array_division.py
index 53515c6..c18444e 100644
--- a/2024.01.16_GUAN_package_learning/example_of_array_division.py
+++ b/2024.01.16_GUAN_package_learning/common/example_of_array_division.py
@@ -1,4 +1,4 @@
-# 数组分割示例
+# 数组分割
 import numpy as np
 import guan
 task_num = 4
diff --git a/2024.01.16_GUAN_package_learning/common/example_of_dump_data.py b/2024.01.16_GUAN_package_learning/common/example_of_dump_data.py
new file mode 100644
index 0000000..a6af983
--- /dev/null
+++ b/2024.01.16_GUAN_package_learning/common/example_of_dump_data.py
@@ -0,0 +1,7 @@
+# 变量写入文件
+import guan
+import numpy as np
+data = np.array([1, 2, 3])
+guan.dump_data(data, filename='a')
+loaded_data = guan.load_data(filename='a')
+print(loaded_data)
\ No newline at end of file
diff --git a/2024.01.16_GUAN_package_learning/common/example_of_print_array.py b/2024.01.16_GUAN_package_learning/common/example_of_print_array.py
new file mode 100644
index 0000000..bf94587
--- /dev/null
+++ b/2024.01.16_GUAN_package_learning/common/example_of_print_array.py
@@ -0,0 +1,4 @@
+# 打印数组
+import guan
+a = [1, 2, 3, 'a', 'b', 'c']
+guan.print_array(a)
\ No newline at end of file
diff --git a/2024.01.16_GUAN_package_learning/test.py b/2024.01.16_GUAN_package_learning/common/example_of_test.py
similarity index 100%
rename from 2024.01.16_GUAN_package_learning/test.py
rename to 2024.01.16_GUAN_package_learning/common/example_of_test.py
diff --git a/2024.01.16_GUAN_package_learning/common/example_of_time_logging.py b/2024.01.16_GUAN_package_learning/common/example_of_time_logging.py
new file mode 100644
index 0000000..c77fd6c
--- /dev/null
+++ b/2024.01.16_GUAN_package_learning/common/example_of_time_logging.py
@@ -0,0 +1,7 @@
+# 运行统计
+import guan
+import time
+guan.statistics_with_day_and_time(content='start')
+for i in range(3):
+    time.sleep(5)
+    guan.statistics_with_day_and_time(f'end_of_{i}')
\ No newline at end of file
diff --git a/2024.01.16_GUAN_package_learning/timer.py b/2024.01.16_GUAN_package_learning/common/example_timer.py
similarity index 88%
rename from 2024.01.16_GUAN_package_learning/timer.py
rename to 2024.01.16_GUAN_package_learning/common/example_timer.py
index e4daebc..78c4fbc 100644
--- a/2024.01.16_GUAN_package_learning/timer.py
+++ b/2024.01.16_GUAN_package_learning/common/example_timer.py
@@ -1,4 +1,4 @@
-# 函数的计时器
+# 函数计时器
 import guan
 
 @guan.timer_decorator
diff --git a/2024.01.16_GUAN_package_learning/example_of_band_structure.py b/2024.01.16_GUAN_package_learning/physics/example_of_band_structure.py
similarity index 97%
rename from 2024.01.16_GUAN_package_learning/example_of_band_structure.py
rename to 2024.01.16_GUAN_package_learning/physics/example_of_band_structure.py
index ab9a95d..21b6d50 100644
--- a/2024.01.16_GUAN_package_learning/example_of_band_structure.py
+++ b/2024.01.16_GUAN_package_learning/physics/example_of_band_structure.py
@@ -1,4 +1,4 @@
-# 能带图计算示例
+# 能带图计算
 import guan
 import numpy as np
 k_array = np.linspace(-np.pi, np.pi, 100)
diff --git a/2024.01.16_GUAN_package_learning/example_of_chern_number_and_wilson_loop.py b/2024.01.16_GUAN_package_learning/physics/example_of_chern_number_and_wilson_loop.py
similarity index 91%
rename from 2024.01.16_GUAN_package_learning/example_of_chern_number_and_wilson_loop.py
rename to 2024.01.16_GUAN_package_learning/physics/example_of_chern_number_and_wilson_loop.py
index 476af8e..67640df 100644
--- a/2024.01.16_GUAN_package_learning/example_of_chern_number_and_wilson_loop.py
+++ b/2024.01.16_GUAN_package_learning/physics/example_of_chern_number_and_wilson_loop.py
@@ -1,4 +1,4 @@
-# 陈数和Wilson loop计算示例
+# 陈数和Wilson loop计算
 import guan
 import numpy as np
 chern_number = guan.calculate_chern_number_for_square_lattice_with_efficient_method(guan.hamiltonian_of_one_QAH_model, precision=100)
diff --git a/2024.01.16_GUAN_package_learning/example_of_conductance_and_scattering_matrix.py b/2024.01.16_GUAN_package_learning/physics/example_of_conductance_and_scattering_matrix.py
similarity index 92%
rename from 2024.01.16_GUAN_package_learning/example_of_conductance_and_scattering_matrix.py
rename to 2024.01.16_GUAN_package_learning/physics/example_of_conductance_and_scattering_matrix.py
index f4de06e..7a6e30b 100644
--- a/2024.01.16_GUAN_package_learning/example_of_conductance_and_scattering_matrix.py
+++ b/2024.01.16_GUAN_package_learning/physics/example_of_conductance_and_scattering_matrix.py
@@ -1,4 +1,4 @@
-# 电导和散射矩阵的计算示例
+# 电导和散射矩阵的计算
 import guan
 import numpy as np
 
diff --git a/2024.01.16_GUAN_package_learning/example_of_dos_calculation.py b/2024.01.16_GUAN_package_learning/physics/example_of_dos_calculation.py
similarity index 97%
rename from 2024.01.16_GUAN_package_learning/example_of_dos_calculation.py
rename to 2024.01.16_GUAN_package_learning/physics/example_of_dos_calculation.py
index b5acc22..6b797c1 100644
--- a/2024.01.16_GUAN_package_learning/example_of_dos_calculation.py
+++ b/2024.01.16_GUAN_package_learning/physics/example_of_dos_calculation.py
@@ -1,4 +1,4 @@
-# 使用格林函数计算态密度示例
+# 使用格林函数计算态密度
 import guan
 import numpy as np
 
diff --git a/2024.01.16_GUAN_package_learning/example_of_gauge_fixing.py b/2024.01.16_GUAN_package_learning/physics/example_of_gauge_fixing.py
similarity index 95%
rename from 2024.01.16_GUAN_package_learning/example_of_gauge_fixing.py
rename to 2024.01.16_GUAN_package_learning/physics/example_of_gauge_fixing.py
index 93a3342..cef8f01 100644
--- a/2024.01.16_GUAN_package_learning/example_of_gauge_fixing.py
+++ b/2024.01.16_GUAN_package_learning/physics/example_of_gauge_fixing.py
@@ -1,4 +1,4 @@
-# 波函数规范的选取示例
+# 波函数规范的选取
 import numpy as np
 import cmath
 import guan
diff --git a/2024.01.16_GUAN_package_learning/example_of_hamiltonian_in_real_space.py b/2024.01.16_GUAN_package_learning/physics/example_of_hamiltonian_in_real_space.py
similarity index 89%
rename from 2024.01.16_GUAN_package_learning/example_of_hamiltonian_in_real_space.py
rename to 2024.01.16_GUAN_package_learning/physics/example_of_hamiltonian_in_real_space.py
index 0746a51..44ba4f5 100644
--- a/2024.01.16_GUAN_package_learning/example_of_hamiltonian_in_real_space.py
+++ b/2024.01.16_GUAN_package_learning/physics/example_of_hamiltonian_in_real_space.py
@@ -1,4 +1,4 @@
-# 实空间哈密顿量的示例
+# 实空间哈密顿量
 import guan
 print('\n', guan.hamiltonian_of_finite_size_system_along_one_direction(3), '\n')
 print(guan.hamiltonian_of_finite_size_system_along_two_directions_for_square_lattice(2, 2), '\n')
diff --git a/2024.01.16_GUAN_package_learning/pauli_matrix.py b/2024.01.16_GUAN_package_learning/physics/example_of_pauli_matrix.py
similarity index 100%
rename from 2024.01.16_GUAN_package_learning/pauli_matrix.py
rename to 2024.01.16_GUAN_package_learning/physics/example_of_pauli_matrix.py