solve <SimSun.ttf> file loading issue

tokenization_qwen.py

@@ -28,8 +28,9 @@ logger = logging.getLogger(__name__)
 
 VOCAB_FILES_NAMES = {"vocab_file": "qwen.tiktoken", "ttf": "SimSun.ttf"}
 FONT_PATH = try_to_load_from_cache("Qwen/Qwen-VL-Chat", "SimSun.ttf")
+ttf_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), "SimSun.ttf")
 if FONT_PATH is None:
-    if not os.path.exists("SimSun.ttf"):
+    if not os.path.exists(ttf_path):
         ttf = requests.get("https://qianwen-res.oss-cn-beijing.aliyuncs.com/Qwen-VL/assets/SimSun.ttf")
         open("SimSun.ttf", "wb").write(ttf.content)
     FONT_PATH = "SimSun.ttf"