Exhibits are shown at a medical equipment exhibition in Zhengzhou, central China's Henan Province, Aug. 4, 2020. A three-day-long medical equipment exhibition was held here on Tuesday and over 1,000 exhibitors from across the country attended the exhibition. (Xinhua/Zhu Xiang)

A visitor tries a protective suit at a medical equipment exhibition in Zhengzhou, central China's Henan Province, Aug. 4, 2020. A three-day-long medical equipment exhibition was held here on Tuesday and over 1,000 exhibitors from across the country attended the exhibition. (Xinhua/Zhu Xiang)

People visit a medical equipment exhibition in Zhengzhou, central China's Henan Province, Aug. 4, 2020. A three-day-long medical equipment exhibition was held here on Tuesday and over 1,000 exhibitors from across the country attended the exhibition. (Xinhua/Zhu Xiang)

People visit a medical equipment exhibition in Zhengzhou, central China's Henan Province, Aug. 4, 2020. A three-day-long medical equipment exhibition was held here on Tuesday and over 1,000 exhibitors from across the country attended the exhibition. (Xinhua/Zhu Xiang)

People visit a medical equipment exhibition in Zhengzhou, central China's Henan Province, Aug. 4, 2020. A three-day-long medical equipment exhibition was held here on Tuesday and over 1,000 exhibitors from across the country attended the exhibition. (Xinhua/Zhu Xiang)

A visitor tries a therapy device at a medical equipment exhibition in Zhengzhou, central China's Henan Province, Aug. 4, 2020. A three-day-long medical equipment exhibition was held here on Tuesday and over 1,000 exhibitors from across the country attended the exhibition. (Xinhua/Zhu Xiang)