Aerial photo taken on Jan. 28, 2020 shows the construction site of Huoshenshan Hospital in Wuhan, central China's Hubei Province. The construction of Huoshenshan Hospital, a makeshift hospital for treating patients infected with the novel coronavirus, is underway in Wuhan.

Aerial photo taken on Jan. 28, 2020 shows the construction site of Huoshenshan Hospital in Wuhan, central China's Hubei Province. The construction of Huoshenshan Hospital, a makeshift hospital for treating patients infected with the novel coronavirus, is underway in Wuhan.

A laborer works at the construction site of Huoshenshan Hospital in Wuhan, central China's Hubei Province, Jan. 28, 2020. The construction of Huoshenshan Hospital, a makeshift hospital for treating patients infected with the novel coronavirus, is underway in Wuhan.

Photo taken on Jan. 28, 2020 shows the construction site of Huoshenshan Hospital in Wuhan, central China's Hubei Province. The construction of Huoshenshan Hospital, a makeshift hospital for treating patients infected with the novel coronavirus, is underway in Wuhan.

Aerial photo taken on Jan. 28, 2020 shows the construction site of Huoshenshan Hospital in Wuhan, central China's Hubei Province. The construction of Huoshenshan Hospital, a makeshift hospital for treating patients infected with the novel coronavirus, is underway in Wuhan.

Aerial photo taken on Jan. 28, 2020 shows the construction site of Huoshenshan Hospital in Wuhan, central China's Hubei Province. The construction of Huoshenshan Hospital, a makeshift hospital for treating patients infected with the novel coronavirus, is underway in Wuhan.

Laborers work at the construction site of Huoshenshan Hospital in Wuhan, central China's Hubei Province, Jan. 28, 2020. The construction of Huoshenshan Hospital, a makeshift hospital for treating patients infected with the novel coronavirus, is underway in Wuhan. (Photos: Xinhua)

A laborer works at the construction site of Huoshenshan Hospital in Wuhan, central China's Hubei Province, Jan. 28, 2020. The construction of Huoshenshan Hospital, a makeshift hospital for treating patients infected with the novel coronavirus, is underway in Wuhan.