Do I need to make a reservation for the bus ticket from Beijing to Liuliqiao in Shexian County?

No need. Beijing coach station is located in the southeast corner of Jianxiang Bridge in the North Fourth Ring Road, adjacent to Badaling Expressway. According to the official introduction of the station, except holidays, there is no need to book tickets for buses from Beijing to Liuliqiao in Shexian County. There is the Asian Games business circle in the northeast of the station, the newly-built Olympic venues such as Bird's Nest and Water Cube, the Zhongguancun High-tech Park in the west, and Xueyuan Road, which has many universities.