As the powerful Typhoon Mangkhut hit south China on Sunday, killing four people and affecting hundreds of thousands of residents, there were some heroes who watched our backs and dedicated themselves to protecting the cities and people facing such dangerous conditions. /VCG Photo

A police officer in south China's Guangdong Province patrolled the streets and reminded passersby to return home as soon as possible before the typhoon landed, in order to ensure their safety. /CCTV News Photo

Firefighters in south China's Guangzhou City conducted drills before the coming typhoon on Sunday. /VCG Photo

As Typhoon Mangkhut made landfall in Guangzhou on Sunday afternoon, police officers were spotted lifting and moving the fallen trees lying in the middle of the road at Baiyun International Airport. /VCG Photo

Although many employees and students in eastern coastal cities were not required to go to work or school due to the typhoon alert, doctors remained on duty. After a power outage caused by the typhoon, doctors and nurses in a hospital in south China's Shenzhen used flashlights to illuminate rooms and conduct check-ups. /Nanfang Plus Photo

In a bid to evacuate elderly people with limited mobility, Li Shengqi, a police officer in south China's Foshan City, ran back and forth to remove each person from the building before transferring them to a rescue center. /CCTV News Photo