1 hour 15 minutes. According to Baidu map, it takes 1 hour and 15 minutes from Huang Beiling to Lingzhi subway station, and the whole journey is 35.2 kilometers. You should take subway line 5. The specific route is as follows:

1. First, walk 820 meters to Huangbeiling Station and take Metro Line 5.

2. Next, get off at Lingzhi Station (A 1 exit).

Finally, walk 350 meters to Lingzhi subway station.