diff --git a/ReadOpt.py b/ReadOpt.py
index 5b3266a..7d1cae4 100644
--- a/ReadOpt.py
+++ b/ReadOpt.py
@@ -1,5 +1,7 @@
 import xml.etree.ElementTree as ET
 
+PLUS = "+"
+EMPTY = ""
 
 def parse_music_xml(file_path):
     # 解析 XML 文件
@@ -36,7 +38,7 @@ def parse_music_xml(file_path):
                 note_infos.append({
                     "designer": designer,
                     "level": f"{level}.{level_decimal}",
-                    "levelshow": f"{level}{"+" if level_decimal > "6" else ""}",
+                    "levelshow": f"{level}{PLUS if int(level_decimal) > 6 else EMPTY}",
                 })
 
     return music_name, artist_name, note_infos
diff --git a/pv_decode.py b/pv_decode.py
index f4cca63..3758805 100644
--- a/pv_decode.py
+++ b/pv_decode.py
@@ -24,7 +24,7 @@ def dat_to_mp4(dat_file: str):
     """ 将 .dat 文件当作 .usm 文件处理，提取并转换为 .mp4 """
     dat_path = Path(dat_file).resolve()
     base_name = dat_path.stem
-    work_dir = dat_path.parent / "work"
+    work_dir = dat_path.parent / "work" / "pv"
 
     usm_path = work_dir / f"{base_name}.dat"  # 直接将 .dat 文件当作 .usm
     ivf_path = work_dir / "output" / f"{base_name}.dat" / "videos" / f"{base_name}.ivf"