Airlines and railway departments began allowing all passengers who have purchased tickets to leave Tianjin for other mainland cities to get free refunds on Tuesday. People are encouraged to stay in Tianjin temporarily.

Zhang Ying, deputy director of the Tianjin Center for Disease Control and Prevention, said the center has established a mature communication mechanism with its counterpart in Beijing to exchange information in time to ensure a smooth and successful 2022 Beijing Winter Olympic Games next month.

Zhou Lu, deputy head of the city's commerce bureau, said Tianjin has an adequate supply of fresh vegetables.

Wu Mingming, a manager of the Sanshuidao Vegetable Market in Hexi district, said it introduced online delivery services for nearby communities on Saturday.

Sun Hongfang, a resident of the Wanying community in Jinnan district, said only one family member can go to designated venues to buy vegetables in her community.

Other residents are required to stay at home to cooperate with the fight against the novel coronavirus, she said.

In Central China's Henan province, 87 locally transmitted cases were reported on Monday, the provincial health commission said on Tuesday.

Of those, 11 were detected in Zhengzhou, the provincial capital, 74 in Xuchang, and two in Anyang.

The provincial government issued a notice on Sunday on the supply of daily necessities during the prevention and control period.

It requires local governments across the province to actively organize supplies, ease transport channels, maintain market order and ensure smooth distribution.

Measures should be formulated to help special groups that may be unable to shop online－for example, migrant workers, the elderly and children－to ensure their daily necessities are provided in a timely manner, the notice said.