What you want to ask is "How can I get to Haidian Shang Jun by subway from Beijing West Railway Station?" Metro Line 9 → Metro Line 4 Daxing Line → Metro Inner Ring 10 → Express Line 345 →5 19.

According to Baidu map, query Beijing West Railway Station to Haidian Shang Jun;

1. Walk from Beijing West Railway Station 10 meters and get on the bus at Beijing West Railway Station.

2. Take Metro Line 9 (in the direction of the National Library) and get off at the National Library Station.

3. Transfer to the station and walk 70 meters to get on the bus at the National Library Station.

4. Take Daxing Line of Metro Line 4 (Anheqiao North) and get off at Haidian Huang Zhuang Station.

5. Get on the train at Haidian Huang Zhuang Station and take subway 10 line 4 stops.

6. Get off at Peony Garden Station (southeast exit C) and walk 620 meters to Peony Garden East Station.

7. Take the 345 Express 1 and get off at Shahe Station. Walk 10 meter and get on at Shahe (northbound) station.

8. Take bus No.519 and get off at Nanyuhe Road East Station, and walk 250 meters to the destination.