diff --git a/third_party/phkit/phkit/chinese/convert.py b/third_party/phkit/phkit/chinese/convert.py
index ba2d90838..72129ef6f 100644
--- a/third_party/phkit/phkit/chinese/convert.py
+++ b/third_party/phkit/phkit/chinese/convert.py
@@ -48,4 +48,4 @@ if __name__ == "__main__":
     assert ban2quan("aA1 ,:$。、") == "ａＡ１　，：＄。、"
     assert quan2ban("ａＡ１　，：＄。、") == "aA1 ,:$。、"
     assert jian2fan("中国语言") == "中國語言"
-    assert jian2fan("中國語言") == "中国语言"
+    assert fan2jian("中國語言") == "中国语言"
diff --git a/third_party/phkit/test.py b/third_party/phkit/test.py
index 30cbee75b..aa33e364c 100644
--- a/third_party/phkit/test.py
+++ b/third_party/phkit/test.py
@@ -46,6 +46,16 @@ def test_phkit():
     assert result == target
 
 
+def test_convert():
+    from phkit import ban2quan, quan2ban, jian2fan, fan2jian
+    assert ban2quan("aA1 ,:$。、") == "ａＡ１　，：＄。、"
+    assert quan2ban("ａＡ１　，：＄。、") == "aA1 ,:$。、"
+    assert jian2fan("中国语言") == "中國語言"
+    assert fan2jian("中國語言") == "中国语言"
+    print(fan2jian("中國語言"))
+    print(jian2fan("中国语言"))
+
 if __name__ == "__main__":
     print(__file__)
     test_phkit()
+    test_convert()