diff --git a/cid_search.py b/cid_search.py
new file mode 100644
index 0000000..defe43a
--- /dev/null
+++ b/cid_search.py
@@ -0,0 +1,40 @@
+import requests
+
+
+def bvid2cid(bvid):
+    url = f"https://api.bilibili.com/x/player/pagelist?bvid={bvid}"
+    headers = {
+        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36 Edg/127.0.0.0',
+
+    }
+    try:
+        response = requests.get(url, headers=headers)
+        response.raise_for_status()  # 检查请求是否成功
+        data = response.json()
+        if 'data' in data and len(data['data']) > 0:
+            cid = data['data'][0]['cid']
+            return cid
+        else:
+            raise ValueError("Data not found in response")
+    except requests.RequestException as e:
+        print(f"Request error for bvid {bvid}: {e}")
+    except ValueError as e:
+        print(f"Value error for bvid {bvid}: {e}")
+    return None
+
+
+def main():
+    with open('bvid.txt', 'r') as file:
+        bvids = file.read().splitlines()
+
+    with open('cid.txt', 'w') as file:
+        for bvid in bvids:
+            cid = bvid2cid(bvid)
+            if cid:
+                file.write(f' {cid}\n')
+            else:
+                file.write(f'{bvid}: Error fetching cid\n')
+
+
+if __name__ == '__main__':
+    main()