diff --git a/m3tpostprocess.py b/m3tpostprocess.py
index 9adf6e8..5b0b81f 100644
--- a/m3tpostprocess.py
+++ b/m3tpostprocess.py
@@ -44,6 +44,10 @@ HALF_FULL_MAP = (
     ('&', '＆'),
     ('%', '％'),
     ('・', '·'),
+    ('“', '「'),
+    ('”', '」'),
+    ("‘", '『'),
+    ("’", '』'),
 )
 MIXED_RULE1 = re.compile(r'[，。、]+([…—～]+)')
 MIXED_RULE2 = re.compile(r'([…—～]+)[，。、]+')
@@ -196,7 +200,7 @@ if __name__ == "__main__":
     parser.add_argument("m3t_path", help="Path to M3T file/directory.")
     parser.add_argument("target_path", nargs="?", default=None, help="Path to save processed M3T file/directory. If not specified, overwrite original files.")
     parser.add_argument("-d", "--dry-run", action="store_true", help="Only show changes without saving.")
-    parser.add_argument("--type", type=ScriptType.from_string, choices=list(ScriptType), help="Process lines with special rules.")
+    parser.add_argument("--type", default=ScriptType.XML, type=ScriptType.from_string, choices=list(ScriptType), help="Process lines with special rules.")
     parser.add_argument("--llm-only", action="store_true", help="Only process LLM lines.")
     parser.add_argument("--ext", default=".txt", help="File extension to process in directory mode.")
     parser.add_argument("--no-replace-quotes", action="store_true", help="Do not replace quotes.")