Yes, download the app, create and pay for an account. When you use ExpressVPN it has a "smart location" function where it selects the server it wants to use outside of mainland China, or you can select a different server location from a list of quite a few around the world to connect with, which I do using one of the three Los Angeles servers since I live in the Southern Cal area. You can connect with any of the server locations on the list - doesn't have to be Los Angeles.
When the program starts it will go through a connection process which may take just a couple of seconds or sometime longer. If it cannot connect, you select a different server and try to connect again. No reason it won't work in Beijing, but I'm using it in Nanning - which is west of Guangzhou.