China has passed new mandatory safety standards, including fire safety, for electric vehicles, EV batteries and electric buses. The new standards enter into force on 1st January 2021. Battery tests will address thermal runaway, water ingress, impacts and external fire resistance. Electric bus safety requirements will include fire resistance specifications for high voltage components.
“China announces new EV safety standards” 14th May 2020 https://www.electrive.com/2020/05/14/china-announces-new-ev-safety-standards/ and in Chinese http://www.miit.gov.cn/n1146290/n1146402/n1146440/c7909341/content.html and http://autonews.gasgoo.com/new_energy/70017149.html