Staff workers install facilities at the Huoyan laboratory in a tennis court in Shijiazhuang, north China's Hebei Province, Jan. 8, 2021. The Huoyan, or Fire Eye laboratory, will have a maximum daily nucleic acid testing capability to 1,000,000 samples after completion. (Xinhua/Yang Shiyao)

Staff workers install facilities at the Huoyan laboratory in a tennis court in Shijiazhuang, north China's Hebei Province, Jan. 8, 2021. The Huoyan, or Fire Eye laboratory, will have a maximum daily nucleic acid testing capability to 1,000,000 samples after completion. (Xinhua/Yang Shiyao)

Staff workers install facilities at the Huoyan laboratory in a tennis court in Shijiazhuang, north China's Hebei Province, Jan. 8, 2021. The Huoyan, or Fire Eye laboratory, will have a maximum daily nucleic acid testing capability to 1,000,000 samples after completion. (Xinhua/Yang Shiyao)

Staff workers install facilities at the Huoyan laboratory in a tennis court in Shijiazhuang, north China's Hebei Province, Jan. 8, 2021. The Huoyan, or Fire Eye laboratory, will have a maximum daily nucleic acid testing capability to 1,000,000 samples after completion. (Xinhua/Yang Shiyao)

A staff worker installs facilities at the Huoyan laboratory in a tennis court in Shijiazhuang, north China's Hebei Province, Jan. 8, 2021. The Huoyan, or Fire Eye laboratory, will have a maximum daily nucleic acid testing capability to 1,000,000 samples after completion. (Xinhua/Yang Shiyao)

A staff worker installs facilities at the Huoyan laboratory in a tennis court in Shijiazhuang, north China's Hebei Province, Jan. 8, 2021. The Huoyan, or Fire Eye laboratory, will have a maximum daily nucleic acid testing capability to 1,000,000 samples after completion. (Xinhua/Yang Shiyao)

Staff workers walk past the Huoyan laboratory in a tennis court in Shijiazhuang, north China's Hebei Province, Jan. 8, 2021. The Huoyan, or Fire Eye laboratory, will have a maximum daily nucleic acid testing capability to 1,000,000 samples after completion. (Xinhua/Yang Shiyao)