Which bus should I take from Wangjing to Longtian? Where can I take it?

1. Walk about150m to Datong Lake Street Station on Wanghe Road.

2. Take the 170 bus, pass 6 stops and arrive at Birthday East Station.

3. Take bus No.257, pass 22 stops and arrive at Huanle Road Station in Da 'nan Street.

4. Walk about 370 meters.