This is the airport in Xishuangbanna, Yunnan province in southwest China. On the afternoon of Oct. 4, the government suddenly issued a notice announcing that no one would be allowed to leave the city starting at 2 p.m. The official terminology was complicated, avoiding the term “city lockdown,” but in reality, it was a de facto city closure. The lightning speed of the closure left some 1,500 tourists stranded at the airport. These tourists from out of town were shocked to find themselves surrounded by men i