An employee works at a heavy-duty truck assembly line of Shaanxi Automobile Holding Group Co., Ltd. in Xi'an, capital of northwest China's Shaanxi Province, April 23, 2020. The company has resumed its production of heavy-duty trucks at full capacity with epidemic prevention and control efforts. (Xinhua/Zhang Bowen)

An employee works at a heavy-duty truck assembly line of Shaanxi Automobile Holding Group Co., Ltd. in Xi'an, capital of northwest China's Shaanxi Province, April 23, 2020. The company has resumed its production of heavy-duty trucks at full capacity with epidemic prevention and control efforts. (Xinhua/Zhang Bowen)

An employee works at a heavy-duty truck assembly line of Shaanxi Automobile Holding Group Co., Ltd. in Xi'an, capital of northwest China's Shaanxi Province, April 23, 2020. The company has resumed its production of heavy-duty trucks at full capacity with epidemic prevention and control efforts. (Xinhua/Zhang Bowen)

An employee works at a heavy-duty truck assembly line of Shaanxi Automobile Holding Group Co., Ltd. in Xi'an, capital of northwest China's Shaanxi Province, April 23, 2020. The company has resumed its production of heavy-duty trucks at full capacity with epidemic prevention and control efforts. (Xinhua/Zhang Bowen)

An employee works at a heavy-duty truck assembly line of Shaanxi Automobile Holding Group Co., Ltd. in Xi'an, capital of northwest China's Shaanxi Province, April 23, 2020. The company has resumed its production of heavy-duty trucks at full capacity with epidemic prevention and control efforts. (Xinhua/Zhang Bowen)

An employee works at a heavy-duty truck assembly line of Shaanxi Automobile Holding Group Co., Ltd. in Xi'an, capital of northwest China's Shaanxi Province, April 23, 2020. The company has resumed its production of heavy-duty trucks at full capacity with epidemic prevention and control efforts. (Xinhua/Zhang Bowen)

An employee works at a heavy-duty truck assembly line of Shaanxi Automobile Holding Group Co., Ltd. in Xi'an, capital of northwest China's Shaanxi Province, April 23, 2020. The company has resumed its production of heavy-duty trucks at full capacity with epidemic prevention and control efforts. (Xinhua/Zhang Bowen)

An employee works at a heavy-duty truck assembly line of Shaanxi Automobile Holding Group Co., Ltd. in Xi'an, capital of northwest China's Shaanxi Province, April 23, 2020. The company has resumed its production of heavy-duty trucks at full capacity with epidemic prevention and control efforts. (Xinhua/Zhang Bowen)