Situated in the southwestern corner of the southwestern province of Yunnan, the city of Ruili in Dehong Dai and Jingpo autonomous prefecture borders Myanmar on three sides, sharing a 170-kilometer frontier with the Southeast Asian nation.

As a result of imported cases of COVID-19, it has suffered four domestic outbreaks since September last year.

To deal with the pressure of epidemic prevention and control, Ruili has set up 631 checkpoints and has put 8,821 people in charge of watching the border in shifts 24 hours a day, seven days a week.