diff --git a/BililiveRecorder.Core/RoomIdFromUrl.cs b/BililiveRecorder.Core/RoomIdFromUrl.cs
new file mode 100644
index 0000000..55f360f
--- /dev/null
+++ b/BililiveRecorder.Core/RoomIdFromUrl.cs
@@ -0,0 +1,9 @@
+using System.Text.RegularExpressions;
+
+namespace BililiveRecorder.Core
+{
+    public static class RoomIdFromUrl
+    {
+        public static readonly Regex Regex = new Regex("""^(?:(?:https?:\/\/)?live\.bilibili\.com\/(?:blanc\/|h5\/)?)?(\d+)\/?(?:[#\?].*)?$""", RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.IgnoreCase);
+    }
+}
diff --git a/BililiveRecorder.WPF/Pages/RoomListPage.xaml.cs b/BililiveRecorder.WPF/Pages/RoomListPage.xaml.cs
index 6f2965f..3d628d1 100644
--- a/BililiveRecorder.WPF/Pages/RoomListPage.xaml.cs
+++ b/BililiveRecorder.WPF/Pages/RoomListPage.xaml.cs
@@ -23,9 +23,6 @@ namespace BililiveRecorder.WPF.Pages
     public partial class RoomListPage
     {
         private static readonly ILogger logger = Log.ForContext<RoomListPage>();
-        private static readonly Regex RoomIdRegex
-            = new Regex(@"^(?:https?:\/\/)?live\.bilibili\.com\/(?:blanc\/|h5\/)?(\d*)(?:\?.*)?$",
-                RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Compiled);
 
         private readonly IRoom?[] NullRoom = new IRoom?[] { null };
 
@@ -159,7 +156,7 @@ namespace BililiveRecorder.WPF.Pages
 
             if (!int.TryParse(input, out var roomid))
             {
-                var m = RoomIdRegex.Match(input);
+                var m = RoomIdFromUrl.Regex.Match(input);
                 if (m.Success && m.Groups.Count > 1 && int.TryParse(m.Groups[1].Value, out var result2))
                 {
                     roomid = result2;
diff --git a/test/BililiveRecorder.Core.UnitTests/Expectations/PublicApi.HasNoChangesAsync.verified.txt b/test/BililiveRecorder.Core.UnitTests/Expectations/PublicApi.HasNoChangesAsync.verified.txt
index 9471bb6..4480862 100644
--- a/test/BililiveRecorder.Core.UnitTests/Expectations/PublicApi.HasNoChangesAsync.verified.txt
+++ b/test/BililiveRecorder.Core.UnitTests/Expectations/PublicApi.HasNoChangesAsync.verified.txt
@@ -474,6 +474,10 @@ namespace BililiveRecorder.Core
         public readonly Microsoft.Extensions.Caching.Memory.MemoryCache memoryCache;
         public PollyPolicy() { }
     }
+    public static class RoomIdFromUrl
+    {
+        public static readonly System.Text.RegularExpressions.Regex Regex;
+    }
     public class RoomStats : System.ComponentModel.INotifyPropertyChanged
     {
         public RoomStats() { }
diff --git a/test/BililiveRecorder.Core.UnitTests/RoomIdFromUrlTests.cs b/test/BililiveRecorder.Core.UnitTests/RoomIdFromUrlTests.cs
new file mode 100644
index 0000000..fdd22b1
--- /dev/null
+++ b/test/BililiveRecorder.Core.UnitTests/RoomIdFromUrlTests.cs
@@ -0,0 +1,82 @@
+using System.Collections.Generic;
+using Xunit;
+
+namespace BililiveRecorder.Core.UnitTests
+{
+    public class RoomIdFromUrlTests
+    {
+        [Theory]
+        [MemberData(nameof(ShouldMatchData))]
+        public void ShouldMatch(string id, string url)
+        {
+            var m = RoomIdFromUrl.Regex.Match(url);
+            Assert.True(m.Success);
+            Assert.Equal(id, m.Groups[1].Value);
+        }
+
+        public static TheoryData<string, string> ShouldMatchData()
+        {
+            var data = new TheoryData<string, string>();
+
+            static IEnumerable<string> basePaths()
+            {
+                yield return "123";
+                yield return "123?abc=def";
+                yield return "123#anything";
+                yield return "123#/";
+                yield return "123?abc=def#anything";
+
+                yield return "123/";
+                yield return "123/?abc=def";
+                yield return "123/#anything";
+                yield return "123/#/";
+                yield return "123/?abc=def#anything";
+            }
+
+            var prefix = new[]
+            {
+                "live.bilibili.com/",
+                "http://live.bilibili.com/",
+                "https://live.bilibili.com/",
+                "live.bilibili.com/blanc/",
+                "http://live.bilibili.com/blanc/",
+                "https://live.bilibili.com/blanc/",
+                "live.bilibili.com/h5/",
+                "http://live.bilibili.com/h5/",
+                "https://live.bilibili.com/h5/",
+            };
+
+            foreach (var p in prefix)
+            {
+                foreach (var b in basePaths())
+                {
+                    data.Add("123", p + b);
+                }
+            }
+
+            return data;
+        }
+
+        [Theory]
+        [MemberData(nameof(ShouldNotMatchData))]
+        public void ShouldNotMatch(string url)
+        {
+            Assert.DoesNotMatch(RoomIdFromUrl.Regex, url);
+        }
+
+        public static TheoryData<string> ShouldNotMatchData()
+        {
+            var data = new TheoryData<string>
+            {
+                "https://live.bilibili.com/123/a",
+                "https://live.bilibili.com/123a",
+                "https://live.bilibili.com/123a/",
+                "https://live.bilibili.com/notnumber",
+                "live.bilibili.com/otherpage/123",
+                "ftp://live.bilibili.com/123"
+            };
+
+            return data;
+        }
+    }
+}