how do I get to Xijiao Bingguan from Beijing Nanyuan Airport?

You can take bus 501 from Nanyuan airport to Jiayuanerli Nanmen and walk about 4 minutes to Jiaomenxi. Take subway line 4 there to Xizhimen and transfer to subway line 13 to Wudaokou. Get off the subway and walk about 10 minutes, you will get to the hotel. It sounds a little inconvenient. You can also take a taxi but a little costly.