The company you are referring to, offers private cars as an alternative to taxis. It’s not a scam. I have used them quite often and they are reputable, honest and transparent. Their fees are based on your destination and usually is around 250-300 rmb for central BEIJING + 10 rmb in cash for the motorway. You can see the fare coming up in the screen as they input your deatination. Taxis are generally fine, but the line can require waiting up to 1 hour at the airport, also private cars are often vans and you can fit 6 people with luggage, whereas taxis are generally for 2 people 2 suitcases. The desk understands basic English and you can agree on the destination, so there is no further need to explain to the driver where you want to go. Most drivers in Beijing would not be able to read an English address and even if you have the Chinese they may not be able to read Chinese either. Remember that even Hilton, Holiday Inn, etc all have achinese names so just saying the hotel name in egliah won’t help. Taxis are super cheap in Beijing, compared to other major cities such as London, New York, Rome, etc. So paying 250 rmb for what’s often a 45 min ride is pretty good.