You didn’t say which station is Line 4, so you can only locate Zhongguancun Station on Line 4 first

Bus lines: Metro Line 4 Daxing Line → Metro Line 10 → 850 Express , the total journey is about 42.8 kilometers

1. Take the Daxing Line of Metro Line 4 from Zhongguancun, go through 1 station, and arrive at Haidian Huangzhuang Station

2. Take the Metro Line 10, go through 11 station and arrive at Sanyuanqiao Station

3. Walk about 330 meters to Sanyuanqiao Station

4. Take Express No. 850 and after 10 stations, arrive at Houqiao Station (also You can take bus 850)

5. Walk about 1.1 kilometers to No. 80 Shuntong Road