-Tian an men Square + Forbidden City + Beihai Park. (subway line 1, tian an men dong station)
-Summer Palace (subway line 4, Bei gong men station)
- temple of heaven(subway line 5, tian tan dong men station), the temple of heaven only need half a day. so you can visit Wang fu jing walking street (line 1, wang fu jing station or line 5, dong dan station, then walk 15 minutes)
niu jie mosque, if you want to niu jie street, you should go there by line 7, guang an men nei station. in this day, you also can visit Qian men street (line 2, Qian men station)
-the great wall + ming tombs, if your hotel can sell ticket, I suggest you buy at there.