60.5 kilometers. According to Baidu map, Huangtian Primary School is 60.5 kilometers away from Shenzhen Boshen Education City, and it takes 2 hours and 4 minutes by subway. The specific route is as follows:

1. First, walk 650 meters from Huangtian Primary School to Hou Rui subway station.

2. Secondly, take the subway 1 line at Hou Rui subway station, take 26 stops and get off at Laojie subway station.

3. Then walk 120 meters, change to Metro Line 3 at the station, pass 14 station, and get off at Ho 'ao subway station.

4. Finally, walk 1. 1 km to reach the destination.