Hi, I travel by train from Beijing for spend a day, I want to go to ancient street and the mosque.

You can take bullet train from Beijing South. Upon arrival, change to Subway Line 4 and get off at Caishikou Station. Out from Exit D and walk along Guanganmen Nei Dajie till OX Street on your left. Turn into the street and you will find the Niujie Moque soon. Ox Street is the Muslim district of Beijing. You can get around this place. As to the ancient Street, I am not very clear about which street?