diff --git a/gateway/platforms/weixin.py b/gateway/platforms/weixin.py
index 3eda50d30..026c84714 100644
--- a/gateway/platforms/weixin.py
+++ b/gateway/platforms/weixin.py
@@ -66,14 +66,6 @@ from gateway.platforms.base import (
 from hermes_constants import get_hermes_home
 from utils import atomic_json_write
 
-try:
-    import pilk
-
-    PILK_AVAILABLE = True
-except ImportError:  # pragma: no cover - optional dependency
-    pilk = None  # type: ignore[assignment]
-    PILK_AVAILABLE = False
-
 ILINK_BASE_URL = "https://ilinkai.weixin.qq.com"
 WEIXIN_CDN_BASE_URL = "https://novac2c.cdn.weixin.qq.com/c2c"
 ILINK_APP_ID = "bot"
@@ -1695,11 +1687,6 @@ class WeixinAdapter(BasePlatformAdapter):
             item_kwargs["encode_type"] = 6
             item_kwargs["sample_rate"] = 24000
             item_kwargs["bits_per_sample"] = 16
-            if PILK_AVAILABLE:
-                try:
-                    item_kwargs["playtime"] = pilk.get_duration(path)
-                except Exception as exc:
-                    logger.warning("[%s] failed to read SILK duration for %s: %s", self.name, path, exc)
         media_item = item_builder(**item_kwargs)
 
         last_message_id = None
diff --git a/tests/gateway/test_weixin.py b/tests/gateway/test_weixin.py
index 211b9b8b5..95df61910 100644
--- a/tests/gateway/test_weixin.py
+++ b/tests/gateway/test_weixin.py
@@ -631,7 +631,7 @@ class TestWeixinVoiceSending:
     @patch.object(weixin, "_api_post", new_callable=AsyncMock)
     @patch.object(weixin, "_upload_ciphertext", new_callable=AsyncMock)
     @patch.object(weixin, "_get_upload_url", new_callable=AsyncMock)
-    def test_send_file_sets_voice_playtime_from_silk_duration(
+    def test_send_file_sets_voice_metadata_for_silk_payload(
         self,
         get_upload_url_mock,
         upload_ciphertext_mock,
@@ -645,13 +645,11 @@ class TestWeixinVoiceSending:
         upload_ciphertext_mock.return_value = "enc-q"
         api_post_mock.return_value = {"success": True}
 
-        with patch("gateway.platforms.weixin.pilk.get_duration", return_value=1260) as duration_mock:
-            asyncio.run(adapter._send_file("wxid_test123", str(silk), ""))
+        asyncio.run(adapter._send_file("wxid_test123", str(silk), ""))
 
-        duration_mock.assert_called_once_with(str(silk))
         payload = api_post_mock.await_args.kwargs["payload"]
         voice_item = payload["msg"]["item_list"][0]["voice_item"]
-        assert voice_item["playtime"] == 1260
+        assert voice_item.get("playtime", 0) == 0
         assert voice_item["encode_type"] == 6
         assert voice_item["sample_rate"] == 24000
         assert voice_item["bits_per_sample"] == 16