China is introducing more restrictive measures to try to control an outbreak of coronavirus that has killed more than 560 people and infected 28,000.
In some areas group dining is banned, there are limits on how often people can go outside, with lifts turned off in some buildings.
There is also a shortage of equipment, with some cities fighting over masks.
Human Rights Watch has criticised the lockdowns, saying China was “treating public health with a sledgehammer”.
The coronavirus causes severe acute respiratory infection and symptoms usually start with a fever, followed by a dry cough. Most people infected are likely to fully recover – just as they would from a flu.
Beijing has banned group dining for events such as birthdays and weddings while cities such as Hangzhou and Nanchang are limiting how many family members can leave home each day.
Hubei province, the worst hit by the virus, has switched off lifts in high-rise buildings to discourage residents from going outside.
Its capital, Wuhan, has a lack of beds and equipment, one senior city official said. Despite the rapid construction of two hospitals, the volume of patients is causing severe strain.
Reports on social media say the Wuhan government is to carry out door-to-door temperature checks on residents.
Although the virus has spread overseas, with confirmed infection in some 25 nations, there have so far been only two deaths outside mainland China – one in Hong Kong and one in the Philippines.
The World Health Organization has declared a global health emergency, saying if funds are not allocated now to tackle the outbreak, nations would pay for it later.