diff --git a/nonebot_plugin_saa/adapters/dodo.py b/nonebot_plugin_saa/adapters/dodo.py
index a39ea393..cfccaee4 100644
--- a/nonebot_plugin_saa/adapters/dodo.py
+++ b/nonebot_plugin_saa/adapters/dodo.py
@@ -90,8 +90,8 @@ async def _image(image: Image, bot: BaseBot) -> MessageSegment:
 
     @register_dodo(Reply)
     def _reply(reply: Reply) -> MessageSegment:
-        assert isinstance(reply.data, DodoMessageId)
-        return MessageSegment.reference(reply.data.message_id)
+        assert isinstance(mid := reply.data["message_id"], DodoMessageId)
+        return MessageSegment.reference(mid.message_id)
 
     @register_dodo(Mention)
     def _mention(mention: Mention) -> MessageSegment:
diff --git a/nonebot_plugin_saa/adapters/feishu.py b/nonebot_plugin_saa/adapters/feishu.py
index 60abb2c7..4f7c8cb4 100644
--- a/nonebot_plugin_saa/adapters/feishu.py
+++ b/nonebot_plugin_saa/adapters/feishu.py
@@ -77,8 +77,8 @@ def _mention(m: Mention) -> MessageSegment:
 
     @register_feishu(Reply)
     def _reply(r: Reply) -> MessageSegment:
-        assert isinstance(r.data, FeishuMessageId)
-        return MessageSegment("reply", {"message_id": r.data.message_id})
+        assert isinstance(mid := r.data["message_id"], FeishuMessageId)
+        return MessageSegment("reply", {"message_id": mid.message_id})
 
     @register_target_extractor(PrivateMessageEvent)
     def _extract_private_msg_event(event: Event) -> TargetFeishuPrivate:
@@ -141,8 +141,10 @@ async def send(
         message_to_send = Message()
         for message_segment_factory in full_msg:
             if isinstance(message_segment_factory, Reply):
-                assert isinstance(message_segment_factory.data, FeishuMessageId)
-                reply_to_message_id = message_segment_factory.data.message_id
+                assert isinstance(
+                    mid := message_segment_factory.data["message_id"], FeishuMessageId
+                )
+                reply_to_message_id = mid.message_id
                 continue
 
             message_segment = await message_segment_factory.build(bot)
diff --git a/nonebot_plugin_saa/adapters/kaiheila.py b/nonebot_plugin_saa/adapters/kaiheila.py
index 55064094..41d152ef 100644
--- a/nonebot_plugin_saa/adapters/kaiheila.py
+++ b/nonebot_plugin_saa/adapters/kaiheila.py
@@ -83,8 +83,8 @@ def _mention(m: Mention) -> MessageSegment:
 
     @register_kaiheila(Reply)
     def _reply(r: Reply) -> MessageSegment:
-        assert isinstance(r.data, KaiheilaMessageId)
-        return MessageSegment.quote(r.data.message_id)
+        assert isinstance(mid := r.data["message_id"], KaiheilaMessageId)
+        return MessageSegment.quote(mid.message_id)
 
     @register_target_extractor(PrivateMessageEvent)
     def _extract_private_msg_event(event: Event) -> TargetKaiheilaPrivate:
diff --git a/nonebot_plugin_saa/adapters/onebot_v11.py b/nonebot_plugin_saa/adapters/onebot_v11.py
index e079c423..223c4484 100644
--- a/nonebot_plugin_saa/adapters/onebot_v11.py
+++ b/nonebot_plugin_saa/adapters/onebot_v11.py
@@ -70,8 +70,8 @@ async def _mention(m: Mention) -> MessageSegment:
 
     @register_onebot_v11(Reply)
     async def _reply(r: Reply) -> MessageSegment:
-        assert isinstance(r.data, OB11MessageId)
-        return MessageSegment.reply(r.data.message_id)
+        assert isinstance(mid := r.data["message_id"], OB11MessageId)
+        return MessageSegment.reply(mid.message_id)
 
     @register_target_extractor(PrivateMessageEvent)
     def _extract_private_msg_event(event: Event) -> TargetQQPrivate:
diff --git a/nonebot_plugin_saa/adapters/onebot_v12.py b/nonebot_plugin_saa/adapters/onebot_v12.py
index 79c23eda..c8b28083 100644
--- a/nonebot_plugin_saa/adapters/onebot_v12.py
+++ b/nonebot_plugin_saa/adapters/onebot_v12.py
@@ -96,8 +96,8 @@ async def _mention(m: Mention) -> MessageSegment:
 
     @register_onebot_v12(Reply)
     async def _reply(r: Reply) -> MessageSegment:
-        assert isinstance(r.data, OB12MessageId)
-        return MessageSegment.reply(r.data.message_id)
+        assert isinstance(mid := r.data["message_id"], OB12MessageId)
+        return MessageSegment.reply(mid.message_id)
 
     @register_target_extractor(PrivateMessageEvent)
     def _extract_private_msg_event(event: Event) -> PlatformTarget:
diff --git a/nonebot_plugin_saa/adapters/qq.py b/nonebot_plugin_saa/adapters/qq.py
index aadc783b..d0e40093 100644
--- a/nonebot_plugin_saa/adapters/qq.py
+++ b/nonebot_plugin_saa/adapters/qq.py
@@ -72,8 +72,8 @@ def _mention(m: Mention) -> MessageSegment:
 
     @register_qq(Reply)
     def _reply(r: Reply) -> MessageSegment:
-        assert isinstance(r.data, QQMessageId)
-        return MessageSegment.reference(r.data.message_id)
+        assert isinstance(mid := r.data["message_id"], QQMessageId)
+        return MessageSegment.reference(mid.message_id)
 
     @register_target_extractor(GuildMessageEvent)
     def extract_message_event(event: Event) -> PlatformTarget:
diff --git a/nonebot_plugin_saa/adapters/qqguild.py b/nonebot_plugin_saa/adapters/qqguild.py
index 0cd6f374..74d1217a 100644
--- a/nonebot_plugin_saa/adapters/qqguild.py
+++ b/nonebot_plugin_saa/adapters/qqguild.py
@@ -62,8 +62,8 @@ def _mention(m: Mention) -> MessageSegment:
 
     @register_qqguild(Reply)
     def _reply(r: Reply) -> MessageSegment:
-        assert isinstance(r.data, QQGuildMessageId)
-        return MessageSegment.reference(r.data.message_id)
+        assert isinstance(mid := r.data["message_id"], QQGuildMessageId)
+        return MessageSegment.reference(mid.message_id)
 
     @register_target_extractor(MessageEvent)
     def extract_message_event(event: Event) -> PlatformTarget:
diff --git a/nonebot_plugin_saa/adapters/red.py b/nonebot_plugin_saa/adapters/red.py
index 8c49c734..96b1012c 100644
--- a/nonebot_plugin_saa/adapters/red.py
+++ b/nonebot_plugin_saa/adapters/red.py
@@ -71,11 +71,11 @@ async def _mention(m: Mention) -> MessageSegment:
 
     @register_red(Reply)
     async def _reply(r: Reply) -> MessageSegment:
-        assert isinstance(r.data, RedMessageId)
+        assert isinstance(mid := r.data["message_id"], RedMessageId)
         return MessageSegment.reply(
-            message_seq=r.data.message_seq,
-            message_id=r.data.message_id,
-            sender_uin=r.data.sender_uin,
+            message_seq=mid.message_seq,
+            message_id=mid.message_id,
+            sender_uin=mid.sender_uin,
         )
 
     @register_target_extractor(PrivateMessageEvent)
diff --git a/nonebot_plugin_saa/adapters/telegram.py b/nonebot_plugin_saa/adapters/telegram.py
index b838d1cf..88d9b9bc 100644
--- a/nonebot_plugin_saa/adapters/telegram.py
+++ b/nonebot_plugin_saa/adapters/telegram.py
@@ -70,8 +70,8 @@ async def _mention(m: Mention) -> MessageSegment:
 
     @register_telegram(Reply)
     async def _reply(r: Reply) -> MessageSegment:
-        assert isinstance(r.data, TelegramMessageId)
-        return MessageSegment("reply", {"message_id": str(r.data.message_id)})
+        assert isinstance(mid := r.data["message_id"], TelegramMessageId)
+        return MessageSegment("reply", {"message_id": str(mid.message_id)})
 
     @register_target_extractor(PrivateMessageEvent)
     @register_target_extractor(GroupMessageEvent)
@@ -165,8 +165,10 @@ async def send(
         message_to_send = Message()
         for message_segment_factory in full_msg:
             if isinstance(message_segment_factory, Reply):
-                assert isinstance(message_segment_factory.data, TelegramMessageId)
-                reply_to_message_id = message_segment_factory.data.message_id
+                assert isinstance(
+                    mid := message_segment_factory.data["message_id"], TelegramMessageId
+                )
+                reply_to_message_id = mid.message_id
                 continue
 
             if (
diff --git a/nonebot_plugin_saa/registries/message_id.py b/nonebot_plugin_saa/registries/message_id.py
index 2a88e536..6f3a8fc9 100644
--- a/nonebot_plugin_saa/registries/message_id.py
+++ b/nonebot_plugin_saa/registries/message_id.py
@@ -1,3 +1,4 @@
+from abc import ABC
 from typing_extensions import Annotated
 from typing import Dict, Type, Callable, Optional
 
@@ -8,7 +9,7 @@
 from ..utils import SupportedAdapters
 
 
-class MessageId(SerializationMeta):
+class MessageId(SerializationMeta, ABC):
     _index_key = "adapter_name"
 
     adapter_name: SupportedAdapters
diff --git a/nonebot_plugin_saa/types/common_message_segment.py b/nonebot_plugin_saa/types/common_message_segment.py
index 2a5123d4..79e7ccfa 100644
--- a/nonebot_plugin_saa/types/common_message_segment.py
+++ b/nonebot_plugin_saa/types/common_message_segment.py
@@ -112,10 +112,14 @@ def __init__(self, user_id: str):
         self.data = {"user_id": user_id}
 
 
+class ReplyData(TypedDict):
+    message_id: MessageId
+
+
 class Reply(MessageSegmentFactory):
     """回复其他消息的消息段"""
 
-    data: MessageId
+    data: ReplyData
 
     def __init__(self, message_id: MessageId):
         """回复其他消息的消息段
@@ -123,9 +127,5 @@ def __init__(self, message_id: MessageId):
         参数:
             message_id: 需要回复消息的 MessageId
         """
-
         super().__init__()
-        self.data = message_id
-
-    def __len__(self) -> int:
-        return 1  # 仅占一个消息段 FIXME: Reply的data应该统一为dict，而不是MessageId
+        self.data = {"message_id": message_id}
diff --git a/tests/test_message.py b/tests/test_message.py
index 2ddd5319..f086cdc5 100644
--- a/tests/test_message.py
+++ b/tests/test_message.py
@@ -37,13 +37,12 @@ def test_message_segment_to_str():
     assert str(i_bytesio) == f"[SAA:Image|name='image',image=<BytesIO {len(b'123')}>]"
     assert repr(i_bytesio) == "Image(name='image', image=BytesIO(b'123'))"
 
-    # FIXME: Reply还不支持
-    # r = Reply(MessageId(adapter_name=SupportedAdapters.fake))
-    # assert r.get("data").get("message_id") == MessageId(
-    #     adapter_name=SupportedAdapters.fake
-    # )
-    # assert str(r) == "[SAA:Reply|message_id=MessageId(adapter_name='fake')]"
-    # assert repr(r) == "Reply(message_id=MessageId(adapter_name='fake'))"
+    r = Reply(MessageId(adapter_name=SupportedAdapters.fake))
+    assert r.get("data").get("message_id") == MessageId(
+        adapter_name=SupportedAdapters.fake
+    )
+    assert str(r).startswith("[SAA:Reply|message_id=MessageId(adapter_name=")
+    assert repr(r).startswith("Reply(message_id=MessageId(adapter_name=")
 
     m = Mention("123")
     assert m.get("data").get("user_id") == "123"