diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 5f7a2c8..69d72d8 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -41,11 +41,11 @@
             "state": {
               "type": "canvas",
               "state": {
-                "file": "00. Inbox/vc-fwUpdate code trace.canvas",
+                "file": "00. Inbox/vc-fwUpdate code trace(Meetup).canvas",
                 "viewState": {
-                  "x": -43,
-                  "y": -346,
-                  "zoom": -0.26061884220394266,
+                  "x": 263,
+                  "y": -321.5,
+                  "zoom": -0.48348606856060145,
                   "snapToGrid": false
                 }
               }
@@ -110,7 +110,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "00. Inbox/vc-fwUpdate code trace.canvas",
+                "file": "00. Inbox/vc-fwUpdate code trace(Meetup).canvas",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -127,7 +127,7 @@
             "state": {
               "type": "outline",
               "state": {
-                "file": "00. Inbox/vc-fwUpdate code trace.canvas"
+                "file": "00. Inbox/vc-fwUpdate code trace(Meetup).canvas"
               }
             }
           },
diff --git a/00. Inbox/vc-fwUpdate code trace(Meetup).canvas b/00. Inbox/vc-fwUpdate code trace(Meetup).canvas
new file mode 100644
index 0000000..c2a6b8b
--- /dev/null
+++ b/00. Inbox/vc-fwUpdate code trace(Meetup).canvas	
@@ -0,0 +1,41 @@
+{
+	"nodes":[
+		{"id":"6bfc707fe9365d07","x":-582,"y":-730,"width":250,"height":50,"type":"text","text":"`Initialize();`"},
+		{"id":"35301ec811a15aa2","x":-434,"y":-646,"width":283,"height":50,"type":"text","text":"`Impl::InitializeController()`"},
+		{"id":"58150c82625254cd","x":233,"y":-462,"width":662,"height":215,"type":"text","text":"`vc-fwUpdate\\Backends\\MeridianBackend\\registration.cpp`\n```cpp\nlogitech::fwupdate::backend::RegisterBackend(IUpdateController& controller) {\n\n}\n```\n\n這邊開始建立所有的update task，以下所列的 task 都繼承自 `class UpdateTask`\n使用 `controller.RegisterTask(...)` 來註冊各個 task"},
+		{"id":"5f57db192293a0ec","x":257,"y":-537,"width":168,"height":51,"type":"text","text":"Impl() d_"},
+		{"id":"5e7c147cd533a922","x":453,"y":-537,"width":289,"height":51,"type":"text","text":"d_->CreatePnpProvider();"},
+		{"id":"cd7947e8636e6b51","x":779,"y":-596,"width":347,"height":110,"type":"text","text":"建立一個看不見的window，背後會有一個 thread 來接收 device notification events：`WM_DEVICECHANGE`"},
+		{"id":"e01a865b5a13d6e9","x":-247,"y":-537,"width":480,"height":51,"type":"text","text":"controller_ = controller::CreateUpdateController();"},
+		{"id":"7d8839591c30f61a","x":-247,"y":-462,"width":406,"height":60,"type":"text","text":"backend::RegisterBackend(*controller_);"},
+		{"id":"c1122f185b292a7c","x":-247,"y":-227,"width":480,"height":145,"type":"text","text":"`vc-fwUpdate\\Frontends-developer\\LogiFWUpdate\\Ui\\LogiFWUpdateDlg.cpp:2761`\n\n--------------------------------------------\n\n`InitializeImageProviders()`"},
+		{"id":"5db0c6d04d6655c7","x":1007,"y":-462,"width":269,"height":60,"type":"text","text":"`AudioDeviceUpdateTask`"},
+		{"id":"f3ccd922e41c8fa2","x":1007,"y":-396,"width":250,"height":60,"type":"text","text":"`BLEDeviceUpdateTask`"},
+		{"id":"3668ba992c38b26a","x":1007,"y":-330,"width":250,"height":60,"type":"text","text":"`AudioCodecUpdateTask`"},
+		{"id":"aa2444242b481f93","x":1007,"y":-247,"width":250,"height":55,"type":"text","text":"`VideoDeviceUpdateTask`"},
+		{"id":"eca2584c45b6e6d5","x":1007,"y":-167,"width":250,"height":60,"type":"text","text":"`VideoEepromUpdateTask`"},
+		{"id":"6aab61cd927b9307","x":-434,"y":-48,"width":311,"height":60,"type":"text","text":"`Impl::RegisterForPnpNotification()`"},
+		{"id":"dade636ce2d72147","x":-434,"y":40,"width":250,"height":60,"type":"text","text":"`Impl::InitializeTasks()`"},
+		{"id":"7ff8bac3fc3253f1","x":-434,"y":125,"width":311,"height":55,"type":"text","text":"`Impl::InitializeDynamicControls()`"},
+		{"id":"5d03eb8ecaadd1dd","x":-750,"y":-823,"width":337,"height":60,"type":"text","text":"`BOOL CLogiFWUpdateDlg::OnInitDialog()`"}
+	],
+	"edges":[
+		{"id":"b621a476fd748a7d","fromNode":"35301ec811a15aa2","fromSide":"bottom","toNode":"e01a865b5a13d6e9","toSide":"left"},
+		{"id":"4c8321febd557726","fromNode":"35301ec811a15aa2","fromSide":"bottom","toNode":"7d8839591c30f61a","toSide":"left"},
+		{"id":"9189c6bb3b246620","fromNode":"e01a865b5a13d6e9","fromSide":"right","toNode":"5f57db192293a0ec","toSide":"left"},
+		{"id":"2e110f57dd9e5bd7","fromNode":"5f57db192293a0ec","fromSide":"right","toNode":"5e7c147cd533a922","toSide":"left"},
+		{"id":"532b641829d3f018","fromNode":"5e7c147cd533a922","fromSide":"right","toNode":"cd7947e8636e6b51","toSide":"left"},
+		{"id":"1b9ae28111c94762","fromNode":"7d8839591c30f61a","fromSide":"right","toNode":"58150c82625254cd","toSide":"left"},
+		{"id":"bafcfd90de5e5be7","fromNode":"58150c82625254cd","fromSide":"right","toNode":"5db0c6d04d6655c7","toSide":"left"},
+		{"id":"6cb9b23f0f009736","fromNode":"58150c82625254cd","fromSide":"right","toNode":"f3ccd922e41c8fa2","toSide":"left"},
+		{"id":"9aad0f03a71efc9c","fromNode":"58150c82625254cd","fromSide":"right","toNode":"3668ba992c38b26a","toSide":"left"},
+		{"id":"491802f7e6933c36","fromNode":"58150c82625254cd","fromSide":"right","toNode":"aa2444242b481f93","toSide":"left"},
+		{"id":"ff38d8bf4a41eb8e","fromNode":"58150c82625254cd","fromSide":"right","toNode":"eca2584c45b6e6d5","toSide":"left"},
+		{"id":"c9e94cf99468eddd","fromNode":"35301ec811a15aa2","fromSide":"bottom","toNode":"c1122f185b292a7c","toSide":"left"},
+		{"id":"91b93c94fe07a699","fromNode":"6bfc707fe9365d07","fromSide":"bottom","toNode":"35301ec811a15aa2","toSide":"left"},
+		{"id":"7df607f1045d8c07","fromNode":"6bfc707fe9365d07","fromSide":"bottom","toNode":"6aab61cd927b9307","toSide":"left"},
+		{"id":"a996f628d78564a0","fromNode":"6bfc707fe9365d07","fromSide":"bottom","toNode":"dade636ce2d72147","toSide":"left"},
+		{"id":"2969440a55132bf4","fromNode":"6bfc707fe9365d07","fromSide":"bottom","toNode":"7ff8bac3fc3253f1","toSide":"left"},
+		{"id":"59e4e9a99d0afb3b","fromNode":"5d03eb8ecaadd1dd","fromSide":"bottom","toNode":"6bfc707fe9365d07","toSide":"left"}
+	]
+}
\ No newline at end of file
diff --git a/00. Inbox/vc-fwUpdate code trace.canvas b/00. Inbox/vc-fwUpdate code trace.canvas
deleted file mode 100644
index b9c5b54..0000000
--- a/00. Inbox/vc-fwUpdate code trace.canvas	
+++ /dev/null
@@ -1,22 +0,0 @@
-{
-	"nodes":[
-		{"id":"bca2e26971f309a8","x":-15,"y":-532,"width":435,"height":61,"type":"text","text":"struct cliwrapper::Impl\n`unique_ptr<IUpdateController>\tcontroller_;`"},
-		{"id":"a00edea0eae89ae6","x":-911,"y":-501,"width":250,"height":60,"type":"text","text":"CLogiFWUpdateDlg"},
-		{"id":"35301ec811a15aa2","x":-738,"y":-424,"width":283,"height":50,"type":"text","text":"Impl::InitializeController()"},
-		{"id":"e01a865b5a13d6e9","x":-535,"y":-350,"width":480,"height":51,"type":"text","text":"controller_ = controller::CreateUpdateController();"},
-		{"id":"5f57db192293a0ec","x":-31,"y":-350,"width":168,"height":51,"type":"text","text":"Impl() d_"},
-		{"id":"5e7c147cd533a922","x":165,"y":-350,"width":289,"height":51,"type":"text","text":"d_->CreatePnpProvider();"},
-		{"id":"7d8839591c30f61a","x":-535,"y":-275,"width":406,"height":60,"type":"text","text":"backend::RegisterBackend(*controller_);"},
-		{"id":"cd7947e8636e6b51","x":491,"y":-409,"width":347,"height":110,"type":"text","text":"建立一個看不見的window，背後會有一個thread來接收 device notification events：WM_DEVICECHANGE"},
-		{"id":"58150c82625254cd","x":-55,"y":-275,"width":662,"height":162,"type":"text","text":"`vc-fwUpdate\\Backends\\MeridianBackend\\registration.cpp`\n```cpp\nlogitech::fwupdate::backend::RegisterBackend(IUpdateController& controller) {\n\n}\n```"}
-	],
-	"edges":[
-		{"id":"55230e1d6c9cf6b8","fromNode":"a00edea0eae89ae6","fromSide":"bottom","toNode":"35301ec811a15aa2","toSide":"left"},
-		{"id":"b621a476fd748a7d","fromNode":"35301ec811a15aa2","fromSide":"bottom","toNode":"e01a865b5a13d6e9","toSide":"left"},
-		{"id":"4c8321febd557726","fromNode":"35301ec811a15aa2","fromSide":"bottom","toNode":"7d8839591c30f61a","toSide":"left"},
-		{"id":"9189c6bb3b246620","fromNode":"e01a865b5a13d6e9","fromSide":"right","toNode":"5f57db192293a0ec","toSide":"left"},
-		{"id":"2e110f57dd9e5bd7","fromNode":"5f57db192293a0ec","fromSide":"right","toNode":"5e7c147cd533a922","toSide":"left"},
-		{"id":"532b641829d3f018","fromNode":"5e7c147cd533a922","fromSide":"right","toNode":"cd7947e8636e6b51","toSide":"left"},
-		{"id":"1b9ae28111c94762","fromNode":"7d8839591c30f61a","fromSide":"right","toNode":"58150c82625254cd","toSide":"left"}
-	]
-}
\ No newline at end of file