diff --git a/2024.01.16_GUAN_package_learning/common/example_timer.py b/2024.01.16_GUAN_package_learning/common/example_of_timer.py
similarity index 100%
rename from 2024.01.16_GUAN_package_learning/common/example_timer.py
rename to 2024.01.16_GUAN_package_learning/common/example_of_timer.py
diff --git a/2024.01.16_GUAN_package_learning/common/example_of_writing_matrix.py b/2024.01.16_GUAN_package_learning/common/example_of_writing_matrix.py
new file mode 100644
index 0000000..e8ec4a9
--- /dev/null
+++ b/2024.01.16_GUAN_package_learning/common/example_of_writing_matrix.py
@@ -0,0 +1,6 @@
+# 矩阵写入文件后查看
+import guan
+import numpy as np
+matrix = np.random.rand(5, 5)
+guan.write_matrix_in_markdown_format(matrix=matrix, filename='markdown_matrix')
+guan.write_matrix_in_latex_format(matrix=matrix, filename='latex_matrix')
\ No newline at end of file