How to get to the airport by subway from Beijing Railway Station?

One of my former colleagues played a joke on determining which railway station you will go to in Beijing first. Caroline_gcz gave us the route from Beijing Railway Station to the airport, but there are several railway stations in Beijing! ! ! ! The bullet train also stops at Beijing West Railway Station and Beijing South Railway Station.

If you get off at Beijing West Railway Station, you should take Metro Line 9 to the National Library, transfer to Line 4 to Xizhimen, then transfer to Line 2 to Dongzhimen, and finally transfer to the Airport Express.

If you get off at Beijing South Railway Station, please take Line 4 to Xuanwumen, transfer to Line 2 to Dongzhimen, and transfer to Airport Express.

I don't know which terminal of the airport you are going to, because I don't know which airline you are flying. However, as long as you get to the airport, it is more convenient to change the terminal. Attention! The airport express is different from the subway, and the departure time is longer, usually 10 minutes! ! !

In short, I am more enthusiastic to ask Beijingers, hoping to help you not to miss the plane! ! !