diff --git a/convert.py b/convert.py
new file mode 100644
index 0000000000000000000000000000000000000000..00cee2e00ccaf165c72da70041e144b9aa82ab69
--- /dev/null
+++ b/convert.py
@@ -0,0 +1,4 @@
+f = open("unknown.txt", encoding="utf_16_be")
+str = f.read()
+with open("known.txt", "w", encoding="utf-8", newline="\r\n") as file:
+    file.write(str)
diff --git a/data_excel.csv b/data_excel.csv
new file mode 100644
index 0000000000000000000000000000000000000000..57db074bd558129178751c4aad1afba372d6e0ae
--- /dev/null
+++ b/data_excel.csv
@@ -0,0 +1,4 @@
+国家,首都
+中国,北京
+美国,华盛顿
+俄罗斯,莫斯科
diff --git a/data_unix.csv b/data_unix.csv
new file mode 100644
index 0000000000000000000000000000000000000000..74267c5d8d2122c37c540a3413550033ccc785d8
--- /dev/null
+++ b/data_unix.csv
@@ -0,0 +1,4 @@
+国家,首都
+中国,北京
+美国,华盛顿
+俄罗斯,莫斯科
diff --git a/make_excel_csv.py b/make_excel_csv.py
new file mode 100644
index 0000000000000000000000000000000000000000..98a1aa67c25f0de52c6a348a6217f43b5589125c
--- /dev/null
+++ b/make_excel_csv.py
@@ -0,0 +1,9 @@
+import pandas as pd
+
+df = pd.DataFrame(
+    {
+        "国家": ["中国", "美国", "俄罗斯"],
+        "首都": ["北京", "华盛顿", "莫斯科"],
+    }
+)
+df.to_csv("data_excel.csv", index=False, encoding="utf-8-sig", lineterminator="\r\n")