I was lucky enough to spend 8 days in Beijing in June this year. Primary reason for the trip was to attend a training course for work but I took the opportunity to stay on for a couple of extra days to do some sightseeing of the city and its surrounds.
I stayed in the hotel where the course was organised, the Hilton Beijing. Its in what is referred to as the diplomatic area of the city and a quick walk around the neighbourhood soon showed why. A very closely guarded US Embassy was on the street right behind the hotel.