I will be Arriving Kunming Airport at 1.30am and my next train departs at 7:15 to Lijiang.

What is the best way to spend 5 hours time waiting? I will be travelling with my 10 & 4 years old children. Should I stay in airport or straight away go Railway station and wait there if it's open at midnight? Or there is a Cafe that opens 24 hours nearby the railway station.