diff --git a/get_cid.py b/get_cid.py
new file mode 100644
index 0000000..2346ce7
--- /dev/null
+++ b/get_cid.py
@@ -0,0 +1,34 @@
+import json
+import requests
+import random
+import time
+import re
+
+headers = {
+    "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.289 Safari/537.36",
+    "Cookie": "i-wanna-go-back=-1; buvid_fp_plain=undefined; CURRENT_BLACKGAP=0; blackside_state=0; LIVE_BUVID=AUTO5216539051785441; buvid4=BF640363-932C-9859-2DEB-9D5332BED8BA14521-022050118-RBQaCti2N%2FgbXXvSImVESA%3D%3D; buvid3=EA6B6EE5-CF42-44F0-8BF1-0E035F5182C9167646infoc; DedeUserID=506881997; DedeUserID__ckMd5=6816981dbd4223e9; CURRENT_FNVAL=4048; rpdid=|(u))kRlJJ)u0J'uYY)l~u)~J; CURRENT_QUALITY=80; hit-new-style-dyn=1; CURRENT_PID=150df130-cdea-11ed-9e61-390f799e5bb1; _uuid=68159E9C-3BA8-49EE-A1C6-D7E510610D865E40530infoc; nostalgia_conf=-1; b_ut=5; FEED_LIVE_VERSION=V8; hit-dyn-v2=1; home_feed_column=5; browser_resolution=1530-712; header_theme_version=CLOSE; fingerprint=93340026c1ba350713aeadf8766000e1; SESSDATA=5c25a608%2C1709466512%2Cc7e4b%2A92gDhsEFKTVzRobJkJtk9Sk1ph71ufczEtnhZVk3UyXcKE4ChKGDta46HuRUO_g-u_Rbl2OgAAYQA; bili_jct=37f8d40c6076352e8e44a85bbbeb65a4; sid=7px9659x; bili_ticket=eyJhbGciOiJIUzI1NiIsImtpZCI6InMwMyIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2OTQxODU3MzksImlhdCI6MTY5MzkyNjUzOSwicGx0IjotMX0.ek0FRkjhs25UswbCHtI0R25Otecvf_5FppkCkYoDMCE; bili_ticket_expires=1694185739; PVID=3; b_nut=100; buvid_fp=93340026c1ba350713aeadf8766000e1; b_lsid=109D53E510_18A6AC7C071; bp_video_offset_506881997=838254238965432390",
+}
+
+def video_cid(bvid):
+    sleep_time = random.randint(0, 3) + random.random()
+    time.sleep(sleep_time)
+    url = "https://api.bilibili.com/x/player/pagelist?bvid=" + str(bvid) + "&jsonp=jsonp"
+    video_logo = requests.get(url=url, headers=headers)
+    video_name = video_logo.text
+    name = json.loads(video_name)
+    cid = name['data'][0]['cid']
+    return cid
+
+if __name__ == '__main__':
+
+    cnt = 0
+    with open('./urls.txt', 'r') as file:
+        for line in file:
+            url = line.strip()
+            bvid = re.findall('https://www.bilibili.com/video/(.*?)/', url)[0]
+            cid = video_cid(bvid)
+            with open('./cid.txt', mode='a') as f:
+                f.write(f"{cid}\n")
+            cnt = cnt + 1
+            print(f"cid : {cnt}/300")
+    
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