Bullet train driver Yuan Fa holds his daughter at Guilinbei Railway Station in Guilin, south China's Guangxi Zhuang Autonomous Region, May 6, 2020. Bullet train drivers from Guangxi, sent by China Railway Nanning Group Co., Ltd. to aid the fight against the COVID-19 epidemic in Wuhan, returned home on Wednesday. Twenty-three drivers had undertaken the tasks of driving 16 pairs of bullet trains with a total of 1,120 trips to ensure the delivery of anti-epidemic materials. (Xinhua/Zhang Ailin)

A bullet train driver is on duty on the way back to Guilinbei Railway Station in Guilin, south China's Guangxi Zhuang Autonomous Region, May 6, 2020. Bullet train drivers from Guangxi, sent by China Railway Nanning Group Co., Ltd. to aid the fight against the COVID-19 epidemic in Wuhan, returned home on Wednesday. Twenty-three drivers had undertaken the tasks of driving 16 pairs of bullet trains with a total of 1,120 trips to ensure the delivery of anti-epidemic materials. (Xinhua/Zhang Ailin)

A volunteer (R) presents flowers to bullet train driver Xu Weifeng at Guilinbei Railway Station in Guilin, south China's Guangxi Zhuang Autonomous Region, May 6, 2020. Bullet train drivers from Guangxi, sent by China Railway Nanning Group Co., Ltd. to aid the fight against the COVID-19 epidemic in Wuhan, returned home on Wednesday. Twenty-three drivers had undertaken the tasks of driving 16 pairs of bullet trains with a total of 1,120 trips to ensure the delivery of anti-epidemic materials. (Xinhua/Zhang Ailin)

Bullet train drivers from China Railway Nanning Group Co., Ltd. arrive at Guilinbei Railway Station in Guilin, south China's Guangxi Zhuang Autonomous Region, May 6, 2020. Bullet train drivers from Guangxi, sent by China Railway Nanning Group Co., Ltd. to aid the fight against the COVID-19 epidemic in Wuhan, returned home on Wednesday. Twenty-three drivers had undertaken the tasks of driving 16 pairs of bullet trains with a total of 1,120 trips to ensure the delivery of anti-epidemic materials. (Xinhua/Zhang Ailin)