diff --git a/BBDown.Core/Config.cs b/BBDown.Core/Config.cs
index 7fadd6f04..b75e11626 100644
--- a/BBDown.Core/Config.cs
+++ b/BBDown.Core/Config.cs
@@ -15,6 +15,8 @@ public class Config
         //BiliPlus Area
         public static string AREA { get; set; } = "";
 
+        public static string WBI { get; set; } = "";
+
         public static readonly Dictionary<string, string> qualitys = new() {
             {"127","8K 超高清" }, {"126","杜比视界" }, {"125","HDR 真彩" }, {"120","4K 超清" }, {"116","1080P 高帧率" },
             {"112","1080P 高码率" }, {"80","1080P 高清" }, {"74","720P 高帧率" },
diff --git a/BBDown.Core/Fetcher/SpaceVideoFetcher.cs b/BBDown.Core/Fetcher/SpaceVideoFetcher.cs
index 5a60e9a1e..5c4bb8c79 100644
--- a/BBDown.Core/Fetcher/SpaceVideoFetcher.cs
+++ b/BBDown.Core/Fetcher/SpaceVideoFetcher.cs
@@ -1,6 +1,5 @@
 using BBDown.Core.Entity;
 using System;
-using System.Security.Cryptography;
 using System.Text;
 using System.Text.Json;
 using static BBDown.Core.Util.HTTPUtil;
@@ -10,24 +9,16 @@ namespace BBDown.Core.Fetcher
 {
     public class SpaceVideoFetcher : IFetcher
     {
-        public static string WbiSign(string api, string wbi)
-        {
-            return $"{api}&w_rid=" + string.Concat(MD5.HashData(Encoding.UTF8.GetBytes(api + wbi)).Select(i => i.ToString("x2")).ToArray());
-        }
-
         public async Task<VInfo> FetchAsync(string id)
         {
             id = id[4..];
-            string[] tmp = id.Split("|");
-            id = tmp[0];
-            var wbi = tmp[1];
             // using the live API can bypass w_rid
             string userInfoApi = $"https://api.live.bilibili.com/live_user/v1/Master/info?uid={id}";
             string userName = GetValidFileName(JsonDocument.Parse(await GetWebSourceAsync(userInfoApi)).RootElement.GetProperty("data").GetProperty("info").GetProperty("uname").ToString(), ".", true);
             List<string> urls = new();
             int pageSize = 50;
             int pageNumber = 1;
-            var api = WbiSign($"mid={id}&order=pubdate&pn={pageNumber}&ps={pageSize}&tid=0&wts={DateTimeOffset.Now.ToUnixTimeSeconds().ToString()}", wbi);
+            var api = Parser.WbiSign($"mid={id}&order=pubdate&pn={pageNumber}&ps={pageSize}&tid=0&wts={DateTimeOffset.Now.ToUnixTimeSeconds().ToString()}");
             api = $"https://api.bilibili.com/x/space/wbi/arc/search?{api}";
             string json = await GetWebSourceAsync(api);
             var infoJson = JsonDocument.Parse(json);
@@ -41,7 +32,7 @@ public async Task<VInfo> FetchAsync(string id)
             while (pageNumber < totalPage)
             {
                 pageNumber++;
-                urls.AddRange(await GetVideosByPageAsync(pageNumber, pageSize, id, wbi));
+                urls.AddRange(await GetVideosByPageAsync(pageNumber, pageSize, id));
             }
             File.WriteAllText($"{userName}的投稿视频.txt", string.Join('\n', urls));
             Log("目前下载器不支持下载用户的全部投稿视频，不过程序已经获取到了该用户的全部投稿视频地址，你可以自行使用批处理脚本等手段调用本程序进行批量下载。如在Windows系统你可以使用如下代码：");
@@ -53,10 +44,10 @@ public async Task<VInfo> FetchAsync(string id)
             throw new Exception("暂不支持该功能");
         }
 
-        static async Task<List<string>> GetVideosByPageAsync(int pageNumber, int pageSize, string mid, string wbi)
+        static async Task<List<string>> GetVideosByPageAsync(int pageNumber, int pageSize, string mid)
         {
             List<string> urls = new();
-            var api = WbiSign($"mid={mid}&order=pubdate&pn={pageNumber}&ps={pageSize}&tid=0&wts={DateTimeOffset.Now.ToUnixTimeSeconds().ToString()}", wbi);
+            var api = Parser.WbiSign($"mid={mid}&order=pubdate&pn={pageNumber}&ps={pageSize}&tid=0&wts={DateTimeOffset.Now.ToUnixTimeSeconds().ToString()}");
             api = $"https://api.bilibili.com/x/space/wbi/arc/search?{api}";
             string json = await GetWebSourceAsync(api);
             var infoJson = JsonDocument.Parse(json);
diff --git a/BBDown.Core/Parser.cs b/BBDown.Core/Parser.cs
index 97276e30e..90caacab3 100644
--- a/BBDown.Core/Parser.cs
+++ b/BBDown.Core/Parser.cs
@@ -10,6 +10,11 @@ namespace BBDown.Core
 {
     public partial class Parser
     {
+        public static string WbiSign(string api)
+        {
+            return $"{api}&w_rid=" + string.Concat(MD5.HashData(Encoding.UTF8.GetBytes(api + Config.WBI)).Select(i => i.ToString("x2")).ToArray());
+        }
+
         private static async Task<string> GetPlayJsonAsync(bool onlyAvc, string aidOri, string aid, string cid, string epId, bool tvApi, bool intl, bool appApi, string qn = "0")
         {
             LogDebug("aid={0},cid={1},epId={2},tvApi={3},IntlApi={4},appApi={5},qn={6}", aid, cid, epId, tvApi, intl, appApi, qn);
@@ -24,13 +29,14 @@ private static async Task<string> GetPlayJsonAsync(bool onlyAvc, string aidOri,
             if (appApi) return await AppHelper.DoReqAsync(aid, cid, epId, qn, bangumi, onlyAvc, Config.TOKEN);
 
             string prefix = tvApi ? bangumi ? "api.snm0516.aisee.tv/pgc/player/api/playurltv" : "api.snm0516.aisee.tv/x/tv/ugc/playurl"
-                        : bangumi ? $"{Config.HOST}/pgc/player/web/playurl" : $"{Config.HOST}/x/player/playurl";
-            string api = $"https://{prefix}?avid={aid}&cid={cid}&qn={qn}&type=&otype=json" + (tvApi ? "" : "&fourk=1") +
-                $"&fnver=0&fnval=4048" + (Config.AREA != "" ? Config.TOKEN != "" ? $"&access_key={Config.TOKEN}&area={Config.AREA}" : $"&area={Config.AREA}" : "") +
-                (tvApi ? "&device=android&platform=android" +
-                "&mobi_app=android_tv_yst&npcybs=0&force_host=2&build=102801" +
-                (Config.TOKEN != "" ? $"&access_key={Config.TOKEN}" : "") : "") +
-                (bangumi ? $"&module=bangumi&ep_id={epId}&fourk=1" + "&session=" : "");
+                        : bangumi ? $"{Config.HOST}/pgc/player/web/playurl" : "api.bilibili.com/x/player/wbi/playurl";
+
+            string api = $"avid={aid}&cid={cid}&fnval=4048&fnver=0" +
+                (tvApi ? "" : "&fourk=1") + (Config.AREA != "" ? Config.TOKEN != "" ? $"&access_key={Config.TOKEN}&area={Config.AREA}" : $"&area={Config.AREA}" : "") +
+                (tvApi ? "&device=android&platform=android&mobi_app=android_tv_yst&npcybs=0&force_host=2&build=102801" +
+                (Config.TOKEN != "" ? $"&access_key={Config.TOKEN}" : "") : "") + $"&otype=json&qn={qn}" +
+                (bangumi ? $"&module=bangumi&ep_id={epId}&fourk=1&session=" : $"&try_look=1&wts={GetTimeStamp(true)}");
+            api = $"https://{prefix}?{(bangumi ? api : WbiSign(api))}";
             if (tvApi && bangumi)
             {
                 api = (Config.TOKEN != "" ? $"access_key={Config.TOKEN}&" : "") +
@@ -79,6 +85,12 @@ private static async Task<string> GetPlayJsonAsync(string aid, string cid, strin
             return webJson;
         }
 
+        public static string SkiPcdn(List<string> urlList, string baseUrl)
+        {
+            urlList.Add(baseUrl);
+            return urlList.FirstOrDefault(i => !PcdnRegex().IsMatch(i), urlList.First());
+        }
+
         public static async Task<(string, List<Video>, List<Audio>, List<string>, List<string>)> ExtractTracksAsync(string aidOri, string aid, string cid, string epId, bool tvApi, bool intlApi, bool appApi, string qn = "0")
         {
             List<Video> videoTracks = new();
@@ -106,13 +118,15 @@ private static async Task<string> GetPlayJsonAsync(string aid, string cid, strin
                         if (dashVideo.GetProperty("base_url").ToString() != "")
                         {
                             var videoId = stream.GetProperty("stream_info").GetProperty("quality").ToString();
+                            var urlList = new List<string>() { dashVideo.GetProperty("base_url").ToString() };
+                            urlList.AddRange(dashVideo.GetProperty("backup_url").EnumerateArray().ToList().Select(i => i.ToString()));
                             Video v = new()
                             {
                                 dur = pDur,
                                 id = videoId,
                                 dfn = Config.qualitys[videoId],
                                 bandwith = Convert.ToInt64(dashVideo.GetProperty("bandwidth").ToString()) / 1000,
-                                baseUrl = dashVideo.GetProperty("base_url").ToString(),
+                                baseUrl = urlList.FirstOrDefault(i => !BaseUrlRegex().IsMatch(i), urlList.First()),
                                 codecs = GetVideoCodec(dashVideo.GetProperty("codecid").ToString()),
                                 size = dashVideo.TryGetProperty("size", out var sizeNode) ? Convert.ToDouble(sizeNode.ToString()) : 0
                             };
@@ -123,13 +137,15 @@ private static async Task<string> GetPlayJsonAsync(string aid, string cid, strin
 
                 foreach(var node in audio)
                 {
+                    var urlList = new List<string>() { node.GetProperty("base_url").ToString() };
+                    urlList.AddRange(node.GetProperty("backup_url").EnumerateArray().ToList().Select(i => i.ToString()));
                     Audio a = new()
                     {
                         id = node.GetProperty("id").ToString(),
                         dfn = node.GetProperty("id").ToString(),
                         dur = pDur,
                         bandwith = Convert.ToInt64(node.GetProperty("bandwidth").ToString()) / 1000,
-                        baseUrl = node.GetProperty("base_url").ToString(),
+                        baseUrl = urlList.FirstOrDefault(i => !BaseUrlRegex().IsMatch(i), urlList.First()),
                         codecs = "M4A"
                     };
                     if (!audioTracks.Contains(a)) audioTracks.Add(a);
@@ -393,5 +409,7 @@ private static string GetSign(string parms, bool isBiliPlus)
         private static partial Regex PlayerJsonRegex();
         [GeneratedRegex("http.*:\\d+")]
         private static partial Regex BaseUrlRegex();
+        [GeneratedRegex("://.*:\\d+/")]
+        private static partial Regex PcdnRegex();
     }
 }
diff --git a/BBDown/BBDownUtil.cs b/BBDown/BBDownUtil.cs
index 2b002e37f..850b035a9 100644
--- a/BBDown/BBDownUtil.cs
+++ b/BBDown/BBDownUtil.cs
@@ -801,7 +801,7 @@ public static string RSubString(string sub)
             return sub[..sub.LastIndexOf(".")];
         }
 
-        public static string GetMixinKey(string orig)
+        private static string GetMixinKey(string orig)
         {
             byte[] mixinKeyEncTab = new byte[]
             {
@@ -809,7 +809,7 @@ public static string GetMixinKey(string orig)
                 27, 43, 5, 49, 33, 9, 42, 19, 29, 28, 14, 39, 12, 38, 41, 13
             };
 
-            var tmp = new StringBuilder();
+            var tmp = new StringBuilder(32);
             foreach (var index in mixinKeyEncTab)
             {
                 tmp.Append(orig[index]);
@@ -817,7 +817,7 @@ public static string GetMixinKey(string orig)
             return tmp.ToString();
         }
 
-        public static async Task<(bool, string)> CheckLogin(string cookie)
+        public static async Task<bool> CheckLogin(string cookie)
         {
             try
             {
@@ -826,13 +826,13 @@ public static string GetMixinKey(string orig)
                 var json = JsonDocument.Parse(source).RootElement;
                 var is_login = json.GetProperty("data").GetProperty("isLogin").GetBoolean();
                 var wbi_img = json.GetProperty("data").GetProperty("wbi_img");
-                var wbi = GetMixinKey(RSubString(wbi_img.GetProperty("img_url").GetString()) + RSubString(wbi_img.GetProperty("sub_url").GetString()));
-                LogDebug($"wbi: {wbi}");
-                return (is_login, wbi);
+                Core.Config.WBI = GetMixinKey(RSubString(wbi_img.GetProperty("img_url").GetString()) + RSubString(wbi_img.GetProperty("sub_url").GetString()));
+                LogDebug("wbi: {0}", Core.Config.WBI);
+                return is_login;
             }
             catch (Exception)
             {
-                return (false, "");
+                return false;
             }
         }
 
diff --git a/BBDown/Program.cs b/BBDown/Program.cs
index bc4b91397..0a631c36e 100644
--- a/BBDown/Program.cs
+++ b/BBDown/Program.cs
@@ -354,7 +354,7 @@ private static async Task DoWorkAsync(MyOption myOption)
                 }
 
                 // 检测是否登录了账号
-                (bool is_login, string wbi) = await CheckLogin(Config.COOKIE);
+                bool is_login = await CheckLogin(Config.COOKIE);
                 if (!intlApi && !tvApi && Config.AREA == "")
                 {
                     Log("检测账号登录...");
@@ -411,7 +411,6 @@ private static async Task DoWorkAsync(MyOption myOption)
                 else if (aidOri.StartsWith("mid"))
                 {
                     fetcher = new SpaceVideoFetcher();
-                    aidOri += $"|{wbi}";
                 }
                 else if (aidOri.StartsWith("listBizId"))
                 {