diff --git a/bilibili_api/channel_series.py b/bilibili_api/channel_series.py
index 94dc33ee..aca9e5da 100644
--- a/bilibili_api/channel_series.py
+++ b/bilibili_api/channel_series.py
@@ -79,35 +79,39 @@ def __init__(
         self.is_new = type_.value
         self.id_ = id_
         self.owner = User(self.__uid, credential=credential)
-        self.credential: Credential = credential
+        self.credential: Credential = credential if credential else Credential()
         self.meta = None
-        if not f"{type_.value}-{id_}" in channel_meta_cache.keys():
-            if self.is_new:
-                api = API_USER["channel_series"]["season_info"]
-                params = {"season_id": self.id_}
-            else:
-                api = API_USER["channel_series"]["info"]
-                params = {"series_id": self.id_}
-            resp = Api(**api).update_params(**params).result_sync
-            if self.is_new:
-                self.meta = resp["info"]
-                self.meta["mid"] = resp["info"]["upper"]["mid"]
-                self.__uid = self.meta["mid"]
-                self.owner = User(self.__uid, credential=credential)
-            else:
-                self.meta = resp["meta"]
-                self.__uid = self.meta["mid"]
-                self.owner = User(self.__uid, credential=credential)
-        else:
+        if f"{type_.value}-{id_}" in channel_meta_cache.keys():
             self.meta = channel_meta_cache[f"{type_.value}-{id_}"]
 
-    def get_meta(self) -> dict:
+    async def __fetch_meta(self) -> None:
+        from .user import User
+        if self.is_new:
+            api = API_USER["channel_series"]["season_info"]
+            params = {"season_id": self.id_}
+        else:
+            api = API_USER["channel_series"]["info"]
+            params = {"series_id": self.id_}
+        resp = await Api(**api).update_params(**params).result
+        if self.is_new:
+            self.meta = resp["info"]
+            self.meta["mid"] = resp["info"]["upper"]["mid"]
+            self.__uid = self.meta["mid"]
+            self.owner = User(self.__uid, credential=self.credential)
+        else:
+            self.meta = resp["meta"]
+            self.__uid = self.meta["mid"]
+            self.owner = User(self.__uid, credential=self.credential)
+
+    async def get_meta(self) -> dict:
         """
         获取元数据
 
         Returns:
             调用 API 返回的结果
         """
+        if not self.meta:
+            await self.__fetch_meta()
         return self.meta  # type: ignore
 
     async def get_videos(
@@ -125,6 +129,8 @@ async def get_videos(
         Returns:
             调用 API 返回的结果
         """
+        if self.__uid == -1:
+            await self.__fetch_meta()
         if self.is_new:
             return await self.owner.get_channel_videos_season(self.id_, sort, pn, ps)
         else:
diff --git a/bilibili_api/utils/sync.py b/bilibili_api/utils/sync.py
index e5f938a2..03622213 100644
--- a/bilibili_api/utils/sync.py
+++ b/bilibili_api/utils/sync.py
@@ -5,24 +5,29 @@
 """
 
 import asyncio
-from concurrent.futures import ThreadPoolExecutor
-from typing import Any, Coroutine
+from typing import Any, TypeVar, Coroutine
 
+T = TypeVar("T")
 
-def sync(coroutine: Coroutine) -> Any:
+
+def __ensure_event_loop() -> None:
+    try:
+        asyncio.get_event_loop()
+
+    except:
+        asyncio.set_event_loop(asyncio.new_event_loop())
+
+
+def sync(coroutine: Coroutine[Any, Any, T]) -> T:
     """
     同步执行异步函数，使用可参考 [同步执行异步代码](https://nemo2011.github.io/bilibili-api/#/sync-executor)
 
     Args:
-        coroutine (Coroutine): 执行异步函数所创建的协程对象
+        coroutine (Coroutine): 异步函数
 
     Returns:
-        该协程对象的返回值
+        该异步函数的返回值
     """
-    try:
-        asyncio.get_running_loop()
-    except RuntimeError:
-        return asyncio.run(coroutine)
-    else:
-        with ThreadPoolExecutor() as executor:
-            return executor.submit(asyncio.run, coroutine).result()
+    __ensure_event_loop()
+    loop = asyncio.get_event_loop()
+    return loop.run_until_complete(coroutine)