Workers build drains at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Yang Shiyao)

Aerial photo taken on Jan. 16, 2021 shows the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Yang Shiyao)

A worker installs water heater at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Yang Shiyao)

Workers build drains at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Yang Shiyao)

Workers install doors at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Yang Shiyao)

A worker drinks water at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Jin Liangkuai)

Workers work at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Jin Liangkuai)

A worker is seen with mud on his face at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Jin Liangkuai)

Aerial photo taken on Jan. 16, 2021 shows the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Yang Shiyao)

Aerial photo taken on Jan. 16, 2021 shows the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Jin Liangkuai)

Aerial photo taken on Jan. 16, 2021 shows the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Yang Shiyao)

Workers work at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Yang Shiyao)

A worker works at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Jin Liangkuai)

A worker installs a door at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Yang Shiyao)

Workers work at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Yang Shiyao)

Workers work at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Jin Liangkuai)

Workers work at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Jin Liangkuai)

A worker works at the construction site of a centralized medical observation center in Shijiazhuang, capital of north China's Hebei Province, Jan. 16, 2021. As part of the measures to cope with the recent COVID-19 resurgence, authorities in Shijiazhuang have rushed to build a new isolation center with a designed capacity of 3,000 rooms in Zhengding County. Close contacts and sub-close contacts of confirmed COVID-19 patients will be placed under medical observation in the new center, which will cover a total area of about 33.3 hectares, according to the housing and urban-rural development bureau of Shijiazhuang. With an area of 18 square meters, each room will be equipped with facilities such as air-conditioning and water heaters. (Xinhua/Jin Liangkuai)