Mr.fuer, from Beijing Capital International Airport to Liuliqiao Long-Distance Bus Station (Location: A1, Liuliqiao Nan Li, Fengtai District):
You could take the airport shuttle bus no 7 to reach Beijing West Railway Station firstly,
then you can take a taxi to the bus station directly, it costs around CNY13.00; OR you may take bus no 67 or 937 from Beijing West Railway Station to Liuliqiao Nan stop (However, you need to walk from the south square to the north square of Beijing West Railway Station, for the airport shuttle bus will arrive at the south square and the transfer bus will depart from north square.) Hope it is clear.

Mr.fuer, from Beijing Capital International Airport to Liuliqiao Long-Distance Bus Station (Location: A1, Liuliqiao Nan Li, Fengtai District):
You could take the airport shuttle bus no 7 to reach Beijing West Railway Station firstly,
then you can take a taxi to the bus station directly, it costs around CNY13.00; OR you may take bus no 67 or 937 from Beijing West Railway Station to Liuliqiao Nan stop (However, you need to walk from the south square to the north square of Beijing West Railway Station, for the airport shuttle bus will arrive at the south square and the transfer bus will depart from north square.) Hope it is clear.