An employee works at an automobile company in Yuyao, east China's Zhejiang Province, Jan. 5, 2023. With production lines humming and machines running in full swing, factories across China have resumed busy operations after the country's latest optimization of COVID-19 response and a series of measures to accelerate production resumption. (Xinhua/Huang Zongzhi)

An employee works at an automobile company in Yuyao, east China's Zhejiang Province, Jan. 5, 2023. With production lines humming and machines running in full swing, factories across China have resumed busy operations after the country's latest optimization of COVID-19 response and a series of measures to accelerate production resumption. (Xinhua/Huang Zongzhi)

An employee works at an automobile company in Yuyao, east China's Zhejiang Province, Jan. 5, 2023. With production lines humming and machines running in full swing, factories across China have resumed busy operations after the country's latest optimization of COVID-19 response and a series of measures to accelerate production resumption. (Xinhua/Huang Zongzhi)

(230105) -- NANCHANG, Jan. 5, 2023 (Xinhua) -- Employees work at an automobile lighting company in Nanchang, east China's Jiangxi Province, Jan. 4, 2023. With production lines humming and machines running in full swing, factories across China have resumed busy operations after the country's latest optimization of COVID-19 response and a series of measures to accelerate production resumption. (Xinhua/Zhou Mi)

(230105) -- NANCHANG, Jan. 5, 2023 (Xinhua) -- Employees work at an automobile lighting company in Nanchang, east China's Jiangxi Province, Jan. 4, 2023. With production lines humming and machines running in full swing, factories across China have resumed busy operations after the country's latest optimization of COVID-19 response and a series of measures to accelerate production resumption. (Xinhua/Zhou Mi)

An employee works at an automobile company in Yuyao, east China's Zhejiang Province, Jan. 5, 2023. With production lines humming and machines running in full swing, factories across China have resumed busy operations after the country's latest optimization of COVID-19 response and a series of measures to accelerate production resumption. (Xinhua/Huang Zongzhi)

(230105) -- NANCHANG, Jan. 5, 2023 (Xinhua) -- An employee works at a clothing company in Nanchang, east China's Jiangxi Province, Jan. 4, 2023. With production lines humming and machines running in full swing, factories across China have resumed busy operation after the country's latest optimization of COVID-19 response and a series of measures to accelerate production resumption. (Xinhua/Zhou Mi)

(230105) -- NANCHANG, Jan. 5, 2023 (Xinhua) -- An employee works at a clothing company in Nanchang, east China's Jiangxi Province, Jan. 4, 2023. With production lines humming and machines running in full swing, factories across China have resumed busy operations after the country's latest optimization of COVID-19 response and a series of measures to accelerate production resumption. (Xinhua/Zhou Mi)

An employee works at an automobile company in Yuyao, east China's Zhejiang Province, Jan. 5, 2023. With production lines humming and machines running in full swing, factories across China have resumed busy operations after the country's latest optimization of COVID-19 response and a series of measures to accelerate production resumption. (Xinhua/Huang Zongzhi)