diff --git a/src/ZeroBot.Abstraction/Bot/IBotContext.cs b/src/ZeroBot.Abstraction/Bot/IBotContext.cs
index 31ac989..ee2cedd 100644
--- a/src/ZeroBot.Abstraction/Bot/IBotContext.cs
+++ b/src/ZeroBot.Abstraction/Bot/IBotContext.cs
@@ -38,4 +38,7 @@ ValueTask UpdateGroupReactionAsync(long accountId, long groupId, long messageId,
     void SetEventRepository(IBotEventRepository repository);
     
     ValueTask<string> GetTempResourceUrlAsync(long accountId, string id, CancellationToken cancellationToken = default);
+    
+    ValueTask UploadFileToGroupAsync(long accountId, long groupId, string fileName, MilkyUri fileUri,
+        CancellationToken cancellationToken = default);
 }
diff --git a/src/ZeroBot.Abstraction/Bot/IBotService.cs b/src/ZeroBot.Abstraction/Bot/IBotService.cs
index 045d059..e0bc241 100644
--- a/src/ZeroBot.Abstraction/Bot/IBotService.cs
+++ b/src/ZeroBot.Abstraction/Bot/IBotService.cs
@@ -31,4 +31,7 @@ ValueTask<GetGroupInfoOutput> GetGroupInformationAsync(long groupId,
     ValueTask<string> GetTempResourceUrlAsync(string id, CancellationToken cancellationToken = default);
     
     ValueTask AcceptFriendRequestAsync(string uid, CancellationToken cancellationToken = default);
+
+    ValueTask UploadFileToGroupAsync(long accountId, long groupId, string fileName, MilkyUri fileUri,
+        CancellationToken cancellationToken = default);
 }
diff --git a/src/ZeroBot.Core/Services/BotContext.cs b/src/ZeroBot.Core/Services/BotContext.cs
index 1cdd7b6..fb29da2 100644
--- a/src/ZeroBot.Core/Services/BotContext.cs
+++ b/src/ZeroBot.Core/Services/BotContext.cs
@@ -153,6 +153,14 @@ public ValueTask<string> GetTempResourceUrlAsync(long accountId, string id,
             : botService.GetTempResourceUrlAsync(id, cancellationToken);
     }
 
+    public ValueTask UploadFileToGroupAsync(long accountId, long groupId, string fileName, MilkyUri fileUri,
+        CancellationToken cancellationToken = default)
+    {
+        return !_services.TryGetValue(accountId, out var botService)
+            ? default
+            : botService.UploadFileToGroupAsync(accountId, groupId, fileName, fileUri, cancellationToken);
+    }
+
     public async ValueTask UpdateGroupReactionAsync(long accountId, long groupId, long messageId, string reactionId, bool add,
         CancellationToken cancellationToken = default)
     {
diff --git a/src/plugins/ZeroBot.Milky/Bot/MilkyBot.cs b/src/plugins/ZeroBot.Milky/Bot/MilkyBot.cs
index 832df43..284fb2e 100644
--- a/src/plugins/ZeroBot.Milky/Bot/MilkyBot.cs
+++ b/src/plugins/ZeroBot.Milky/Bot/MilkyBot.cs
@@ -49,6 +49,12 @@ public async ValueTask AcceptFriendRequestAsync(string uid, CancellationToken ca
         await milky.Friend.AcceptFriendRequestAsync(param, cancellationToken);
     }
 
+    public async ValueTask UploadFileToGroupAsync(long accountId, long groupId, string fileName, MilkyUri fileUri,
+        CancellationToken cancellationToken = default)
+    {
+        await milky.File.UploadGroupFileAsync(new UploadGroupFileInput(groupId, "/", fileUri, fileName), cancellationToken);
+    }
+
     public async ValueTask<GetLoginInfoOutput> GetCurrentAccountAsync(CancellationToken cancellationToken = default)
     {
         return await botInfos.GetAccountInfoAsync(cancellationToken);
diff --git a/src/plugins/ZeroBot.Painter/PaintCommandHandler.cs b/src/plugins/ZeroBot.Painter/PaintCommandHandler.cs
index 812229a..e0ad5c4 100644
--- a/src/plugins/ZeroBot.Painter/PaintCommandHandler.cs
+++ b/src/plugins/ZeroBot.Painter/PaintCommandHandler.cs
@@ -212,7 +212,7 @@ private async ValueTask<bool> TryConsumeQuotaAsync(long peerId, long senderId, i
                 value.DailyQuotas[key] = quota = new DailyQuota(today, 0);
             }
 
-            if (quota.Count >= limit) return false;
+            if (limit > -1 && quota.Count >= limit) return false;
 
             value.DailyQuotas[key] = quota with { Count = quota.Count + 1 };
             await config.SaveAsync(value, token);
diff --git a/src/plugins/ZeroBot.Painter/PainterManageCommandHandler.cs b/src/plugins/ZeroBot.Painter/PainterManageCommandHandler.cs
index 235db44..aeb81c7 100644
--- a/src/plugins/ZeroBot.Painter/PainterManageCommandHandler.cs
+++ b/src/plugins/ZeroBot.Painter/PainterManageCommandHandler.cs
@@ -40,7 +40,7 @@ protected override async ValueTask<bool> PredicateAsync(Event<IncomingMessage> m
     protected override async ValueTask HandleAsync(Event<IncomingMessage> message,
         CancellationToken cancellationToken = default)
     {
-        var command = message.ToTextCommands().FirstOrDefault();
+        var command = message.ToTextCommands(argumentSplitters: "：:").FirstOrDefault();
         var arguments = command?.Arguments ?? [];
         var peerId = message.Data.PeerId;
 
diff --git a/src/plugins/ZeroBot.Painter/PainterQuota.cs b/src/plugins/ZeroBot.Painter/PainterQuota.cs
index 74c75c2..3bae91b 100644
--- a/src/plugins/ZeroBot.Painter/PainterQuota.cs
+++ b/src/plugins/ZeroBot.Painter/PainterQuota.cs
@@ -24,5 +24,5 @@ public static DateOnly Today(DateTimeOffset now) =>
     /// <summary>
     /// 启用指令 number 合法性：1 &lt;= number &lt;= max。
     /// </summary>
-    public static bool IsValidDailyLimit(int number, int max) => number >= 1 && number <= max;
+    public static bool IsValidDailyLimit(int number, int max) => number == -1 || (number >= 1 && number <= max);
 }
diff --git a/src/plugins/ZeroBot.Workflow/WorkflowCommandHandler.cs b/src/plugins/ZeroBot.Workflow/WorkflowCommandHandler.cs
index 1139a8f..4841c97 100644
--- a/src/plugins/ZeroBot.Workflow/WorkflowCommandHandler.cs
+++ b/src/plugins/ZeroBot.Workflow/WorkflowCommandHandler.cs
@@ -1,6 +1,5 @@
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
-using Milky.Net.Client;
 using Milky.Net.Model;
 using ZeroBot.Abstraction.Bot;
 using ZeroBot.Abstraction.Service;
@@ -20,7 +19,6 @@ public class WorkflowCommandHandler(
     IPermission permission,
     IOptions<WorkflowOptions> options,
     WorkflowApi api,
-    MilkyClient milky,
     ILogger<WorkflowCommandHandler> logger) : CommandQueuedHandler(dispatcher)
 {
     private const string CommandPrefix = "/workflow";
@@ -146,8 +144,11 @@ private async ValueTask SendResultAsync(Event<IncomingMessage> @event, string si
         }
 
         var fileName = GuessFileName(data);
-        await milky.File.UploadGroupFileAsync(
-            new UploadGroupFileInput(@event.Data.PeerId, "/", new MilkyUri($"base64://{base64}"), fileName),
+        await bot.UploadFileToGroupAsync(
+            @event.SelfId,
+            @event.Data.PeerId,
+            fileName,
+            new MilkyUri($"base64://{base64}"),
             cancellationToken);
     }
 
diff --git a/src/plugins/ZeroBot.Workflow/ZeroBot.Workflow.csproj b/src/plugins/ZeroBot.Workflow/ZeroBot.Workflow.csproj
index f513da8..12b1a57 100644
--- a/src/plugins/ZeroBot.Workflow/ZeroBot.Workflow.csproj
+++ b/src/plugins/ZeroBot.Workflow/ZeroBot.Workflow.csproj
@@ -10,7 +10,6 @@
         <ProjectReference Include="..\..\ZeroBot.Abstraction\ZeroBot.Abstraction.csproj" />
         <ProjectReference Include="..\..\ZeroBot.Utility\ZeroBot.Utility.csproj" />
         <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" />
-        <PackageReference Include="ZeroAsh.Milky.Net.Client" />
     </ItemGroup>
 
 </Project>
diff --git a/test/ZeroBot.Core.Test/PainterQuotaTest.cs b/test/ZeroBot.Core.Test/PainterQuotaTest.cs
index 1d4c3d2..d3f1ffc 100644
--- a/test/ZeroBot.Core.Test/PainterQuotaTest.cs
+++ b/test/ZeroBot.Core.Test/PainterQuotaTest.cs
@@ -29,7 +29,7 @@ public void Key_ShouldCombinePeerAndSender()
     [InlineData(1, true)]
     [InlineData(5, true)]
     [InlineData(6, false)]
-    [InlineData(-1, false)]
+    [InlineData(-1, true)]
     public void IsValidDailyLimit_ShouldRespectBoundaries(int number, bool expected)
     {
         Assert.Equal(expected, PainterQuota.IsValidDailyLimit(number, 5));
diff --git a/test/ZeroBot.Core.Test/TestBotService.cs b/test/ZeroBot.Core.Test/TestBotService.cs
index 5782d94..10b14cd 100644
--- a/test/ZeroBot.Core.Test/TestBotService.cs
+++ b/test/ZeroBot.Core.Test/TestBotService.cs
@@ -70,4 +70,10 @@ public ValueTask AcceptFriendRequestAsync(string uid, CancellationToken cancella
     {
         throw new NotImplementedException();
     }
+
+    public ValueTask UploadFileToGroupAsync(long accountId, long groupId, string fileName, MilkyUri fileUri,
+        CancellationToken cancellationToken = default)
+    {
+        throw new NotImplementedException();
+    }
 }
\ No newline at end of file