diff --git a/module/gamefree/netpkg.py b/module/gamefree/netpkg.py
index feb9ea3b3..faec8e765 100644
--- a/module/gamefree/netpkg.py
+++ b/module/gamefree/netpkg.py
@@ -1,5 +1,5 @@
 import threading
-from typing import Self
+from typing import Union
 
 from google.protobuf import message
 import module.gamefree.bytearray as ba
@@ -9,13 +9,21 @@ class AzurLaneNetworkEndPackage:
     ...
 
 
+class AzurLaneNetworkPackageAbort(Exception):
+    ...
+
+
 class AzurLaneNetworkPackage:
 
     def __init__(self, id, proto_message: message.Message):
         self.event = threading.Event()
         self.proto_message = proto_message
         self.id = id
-        self.returned_data: bytes = None
+        self.returned_data: ba.ByteArray = None
+        self.abort = False
+
+    def is_aborted(self):
+        return self.abort
 
     def pack(self) -> bytes:
         buffer = ba.ByteArray()
@@ -34,8 +42,13 @@ class AzurLaneNetworkPackage:
 
         return buffer.toBytes()
 
-    def unpack(self, data: bytes) -> Self:
-        buffer = ba.ByteArray.fromBytes(data)
+    def unpack(self, data: Union[bytes, ba.ByteArray]):
+        if isinstance(data, bytes):
+            buffer = ba.ByteArray.fromBytes(data)
+        elif isinstance(data, ba.ByteArray):
+            buffer = data
+        else:
+            raise TypeError(f"Invalid data type: {type(data).__name__}")
 
         buffer.readBigEndianUInt16()
         buffer.readBigEndianUInt8()
diff --git a/module/gamefree/network.py b/module/gamefree/network.py
index 18199b3bb..c3fdcdd97 100644
--- a/module/gamefree/network.py
+++ b/module/gamefree/network.py
@@ -12,17 +12,17 @@ class AzurLaneNetworkClient:
     def __init__(self):
         self.task_queue = Queue()
         self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        self.worker: threading.Thread = None
-        self.heartbeater: threading.Thread = None
-        self.heartbeat_thread_event = threading.Event()
+        self.vm: Union[threading.Thread, None] = None
+        self.vm_continue = threading.Event()
+        self.vm_exception: Union[Exception, None] = None
 
     def __del__(self):
-        self.stop_work()
+        self.vm_stop()
 
     def connect(self, addr, port):
         self.server_socket.connect((addr, port))
 
-    def transfer(self, pkg: AzurLaneNetworkPackage) -> bytes:
+    def transfer(self, pkg: AzurLaneNetworkPackage) -> ba.ByteArray:
         self.server_socket.send(pkg.pack())
         buffer = ba.ByteArray()
         while 1:
@@ -30,48 +30,77 @@ class AzurLaneNetworkClient:
             if returned_data == 0:
                 break
             buffer.writeBytes(returned_data)
-        return buffer.toBytes()
+        return buffer
 
-    def start_heartbeat(self):
-        if self.heartbeater is not None:
-            if self.heartbeater.is_alive():
+    def clear_task_queue(self):
+        while not self.task_queue.empty():
+            pkg = self.task_queue.get()
+            pkg.is_aborted = True
+            pkg.event.set()
+
+    def vm_clear_task_queue(self):
+        self.vm_interrupt()
+        self.clear_task_queue()
+        self.vm_resume()
+
+    def vm_start(self):
+        if self.vm is not None:
+            if self.vm.is_alive():
                 return
-        self.heartbeater = threading.Thread(target=self.work_thread)
-        self.heartbeater.start()
+        self.vm = threading.Thread(target=self.vm_thread)
+        self.vm.start()
+        self.vm_continue.set()
 
-    def start_work(self):
-        if self.worker is not None:
-            if self.worker.is_alive():
-                return
-        self.worker = threading.Thread(target=self.work_thread)
-        self.worker.start()
+    def vm_interrupt(self):
+        self.vm_continue.clear()
 
-    def stop_work(self):
-        self.heartbeat_thread_event.set()
-        self.task_queue.queue.clear()
-        self.task_queue.put(AzurLaneNetworkEndPackage())
+    def vm_resume(self):
+        self.vm_continue.set()
 
-    def work_thread(self):
+    def vm_stop(self):
+        self.vm_interrupt()
+        self.clear_task_queue()
+        self.queue_package(AzurLaneNetworkEndPackage())
+        self.vm_resume()
+
+    def vm_wait_until_exception_handled(self):
+        self.vm_continue.wait()
+
+    def vm_get_exception(self) -> Exception:
+        return self.vm_exception
+
+    def vm_has_exception(self):
+        return self.vm_exception is not None
+
+    def vm_set_exception(self, e):
+        self.vm_exception = e
+
+    def vm_clear_exception(self):
+        self.vm_exception = None
+
+    def vm_ensure_continue(self):
+        if not self.vm_continue.is_set():
+            self.vm_continue.wait()
+
+    def vm_thread(self):
         while 1:
+            self.vm_ensure_continue()
             pkg = self.task_queue.get()
             if isinstance(pkg, AzurLaneNetworkEndPackage):
                 break
             elif isinstance(pkg, AzurLaneNetworkPackage):
-                data = self.transfer(pkg)
-                pkg.returned_data = data
-                pkg.event.set()
+                try:
+                    data = self.transfer(pkg)
+                    pkg.returned_data = data
+                    pkg.event.set()
+                except Exception as e:
+                    self.vm_set_exception(e)
+                    self.vm_interrupt()
+                    pkg.event.set()
+                    self.vm_wait_until_exception_handled()
             else:
                 logger.warning(f"Unknown net package class: {type(pkg).__name__}")
 
-    def heartbeat_thread(self):
-        while 1:
-            if self.heartbeat_thread_event.is_set():
-                break
-            self.task_queue.put(HeartBeatPackage())
-            if self.heartbeat_thread_event.is_set():
-                break
-            time.sleep(1)
-
     def queue_package(self, pkg):
         self.task_queue.put(pkg)
 
@@ -86,8 +115,12 @@ class AzurLaneNetwork:
     def __init__(self):
         self.client = AzurLaneNetworkClient.get_instance()
 
-    def send(self, pkg: AzurLaneNetworkPackage) -> bytes:
+    def send(self, pkg: AzurLaneNetworkPackage) -> ba.ByteArray:
         self.client.queue_package(pkg)
         pkg.event.wait()
+        if self.client.vm_has_exception():
+            raise self.client.vm_get_exception()
+        if pkg.is_aborted():
+            raise AzurLaneNetworkPackageAbort()
         return pkg.returned_data