Update visualization.py

visualization.py

@@ -16,7 +16,7 @@ matplotlib.use('Agg')
 # Set up Chinese font support
 # Try to find suitable Chinese fonts
 font_found = False
-chinese_fonts = ['SimHei', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'AR PL UMing CN', 'STSong', 'NSimSun', 'FangSong', 'KaiTi']
+chinese_fonts = ['DejaVu Sans', 'SimHei', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'AR PL UMing CN', 'STSong', 'NSimSun', 'FangSong', 'KaiTi']
 for font in chinese_fonts:
     try:
         matplotlib.font_manager.findfont(font)