Photo taken on Feb. 10, 2020 shows the negative pressure ambulances under modification at a special-purpose vehicle company in Xi'an, northwest China's Shaanxi Province. Relevant enterprises in Xi'an have responed to government's call to resume production and make negative pressure ambulances to meet the needs of hospitals in the prevention and control of the novel coronavirus pneumonia epidemic. (Xinhua/Shao Rui)
Staff members modify a negative pressure ambulance at a special-purpose vehicle company in Xi'an, northwest China's Shaanxi Province, Feb. 10, 2020. Relevant enterprises in Xi'an have responed to government's call to resume production and make negative pressure ambulances to meet the needs of hospitals in the prevention and control of the novel coronavirus pneumonia epidemic. (Xinhua/Shao Rui)
Staff members modify a negative pressure ambulance at a special-purpose vehicle company in Xi'an, northwest China's Shaanxi Province, Feb. 10, 2020. Relevant enterprises in Xi'an have responed to government's call to resume production and make negative pressure ambulances to meet the needs of hospitals in the prevention and control of the novel coronavirus pneumonia epidemic. (Xinhua/Shao Rui)
Staff members modify a negative pressure ambulance at a special-purpose vehicle company in Xi'an, northwest China's Shaanxi Province, Feb. 10, 2020. Relevant enterprises in Xi'an have responed to government's call to resume production and make negative pressure ambulances to meet the needs of hospitals in the prevention and control of the novel coronavirus pneumonia epidemic. (Xinhua/Shao Rui)
A staff member checks the interior of a negative pressure ambulance at a special-purpose vehicle company in Xi'an, northwest China's Shaanxi Province, Feb. 10, 2020. Relevant enterprises in Xi'an have responed to government's call to resume production and make negative pressure ambulances to meet the needs of hospitals in the prevention and control of the novel coronavirus pneumonia epidemic. (Xinhua/Shao Rui)
A staff member tests the UV light and intercom of a negative pressure ambulance at a special-purpose vehicle company in Xi'an, northwest China's Shaanxi Province, Feb. 10, 2020. Relevant enterprises in Xi'an have responed to government's call to resume production and make negative pressure ambulances to meet the needs of hospitals in the prevention and control of the novel coronavirus pneumonia epidemic. (Xinhua/Shao Rui)
Staff members modify a negative pressure ambulance with isolation plate at a special-purpose vehicle company in Xi'an, northwest China's Shaanxi Province, Feb. 10, 2020. Relevant enterprises in Xi'an have responed to government's call to resume production and make negative pressure ambulances to meet the needs of hospitals in the prevention and control of the novel coronavirus pneumonia epidemic. (Xinhua/Shao Rui)