Beijing base has too many pilots now. Mostly local pilots with family/property etc. The company will strongly encourage you to choose Sanya or Hangzhou as a base. If you insist on Beijing, expect to be away for most of the month. Almost like a commuting job to Beijing. Beijing guys are sent for 4-9 days away at a time to either Sanya, Haikou, Hangzhou, Guilin, Hohhot and Xian. Most flights available for foreigners out of Beijing are layovers so don't expect a normal life in Beijing unless you use all you holidays to stay in Beijing. The best bases for roster stability are Sanya, Hangzhou. However, they keep adding routes from various bases so it could all change in a few months.