diff --git a/bot_listener.py b/bot_listener.py
index 93818b90..906d0fd3 100644
--- a/bot_listener.py
+++ b/bot_listener.py
@@ -325,6 +325,13 @@ def start_bot():
                     msg_lines.append(f"   🌬️ {dir_str}{wind_dir}° / {mgm_curr.get('wind_speed_ms')} m/s")
                     if mgm_curr.get("rain_24h") is not None:
                         msg_lines.append(f"   🌧️ 24h 降水: {mgm_curr.get('rain_24h')}mm")
+                    
+                    if mgm_curr.get("time"):
+                        # 处理 MGM 原始时间格式 (例如 2026-02-08 13:00)
+                        obs_time = mgm_curr.get("time")
+                        if " " in obs_time:
+                            obs_time = obs_time.split(" ")[1]
+                        msg_lines.append(f"   🕐 观测: {obs_time} (官方)")
 
             if metar:
                 icao = metar.get("icao", "")
diff --git a/check_freshness.py b/check_freshness.py
new file mode 100644
index 00000000..acb9a730
--- /dev/null
+++ b/check_freshness.py
@@ -0,0 +1,23 @@
+import requests
+import json
+import time
+
+def test_mgm(istno):
+    # 添加时间戳防止缓存
+    url = f"https://servis.mgm.gov.tr/web/sondurumlar?istno={istno}&_={int(time.time()*1000)}"
+    headers = {
+        "Origin": "https://www.mgm.gov.tr",
+        "User-Agent": "Mozilla/5.0"
+    }
+    try:
+        resp = requests.get(url, headers=headers)
+        if resp.status_code == 200:
+            data = resp.json()
+            print(json.dumps(data, indent=2, ensure_ascii=False))
+        else:
+            print(f"Error: {resp.status_code}")
+    except Exception as e:
+        print(f"Exception: {e}")
+
+print("--- Station 17128 (Esenboğa) ---")
+test_mgm(17128)
diff --git a/src/data_collection/weather_sources.py b/src/data_collection/weather_sources.py
index 6d7adeab..80a0e27f 100644
--- a/src/data_collection/weather_sources.py
+++ b/src/data_collection/weather_sources.py
@@ -332,24 +332,29 @@ class WeatherDataCollector:
         results = {}
         
         try:
-            # 1. 实时数据
-            obs_resp = self.session.get(f"{base_url}/sondurumlar?istno={istno}", headers=headers, timeout=self.timeout)
+            # 1. 实时数据 (添加时间戳防止 CDN 缓存)
+            import time
+            obs_resp = self.session.get(
+                f"{base_url}/sondurumlar?istno={istno}&_={int(time.time()*1000)}", 
+                headers=headers, 
+                timeout=self.timeout
+            )
             if obs_resp.status_code == 200:
                 data = obs_resp.json()
                 if data:
                     latest = data[0] if isinstance(data, list) else data
                     # MGM 数据字段映射
-                    # ruzgarHiz 通常为 m/s 或 km/h，根据用户反馈这里使用 m/s 逻辑
-                    ruz_hiz = latest.get("ruzgarHiz", 0)
+                    # ruzgarHiz 实测为 km/h，转为 m/s 需要除以 3.6
+                    ruz_hiz_kmh = latest.get("ruzgarHiz", 0)
                     results["current"] = {
                         "temp": latest.get("sicaklik"),
                         "feels_like": latest.get("hissedilenSicaklik") or latest.get("sicaklik"),
                         "humidity": latest.get("nem"),
-                        "wind_speed_ms": ruz_hiz,
-                        "wind_speed_kt": round(ruz_hiz * 1.94, 1) if ruz_hiz is not None else None, # 如果是 m/s 转 kt
+                        "wind_speed_ms": round(ruz_hiz_kmh / 3.6, 1) if ruz_hiz_kmh is not None else None,
+                        "wind_speed_kt": round(ruz_hiz_kmh / 1.852, 1) if ruz_hiz_kmh is not None else None,
                         "wind_dir": latest.get("ruzgarYon"),
                         "rain_24h": latest.get("toplamYagis"),
-                        "time": latest.get("veriZamani"),
+                        "time": latest.get("veriZamani"), # 观测时间
                         "station_name": latest.get("istasyonAd") or latest.get("adi") or latest.get("merkezAd") or "Ankara Esenboğa"
                     }