People visit the China Machine Tool Exhibition at the National Exhibition and Convention Center (NECC) in Shanghai, east China, July 1, 2020. The China Machine Tool Exhibition kicked off here on Wednesday with nearly 1,500 manufacturers from home and abroad participating. (Xinhua/Fang Zhe)

People visit the China Machine Tool Exhibition at the National Exhibition and Convention Center (NECC) in Shanghai, east China, July 1, 2020. The China Machine Tool Exhibition kicked off here on Wednesday with nearly 1,500 manufacturers from home and abroad participating. (Xinhua/Fang Zhe)

People visit the China Machine Tool Exhibition at the National Exhibition and Convention Center (NECC) in Shanghai, east China, July 1, 2020. The China Machine Tool Exhibition kicked off here on Wednesday with nearly 1,500 manufacturers from home and abroad participating. (Xinhua/Fang Zhe)

People visit the China Machine Tool Exhibition at the National Exhibition and Convention Center (NECC) in Shanghai, east China, July 1, 2020. The China Machine Tool Exhibition kicked off here on Wednesday with nearly 1,500 manufacturers from home and abroad participating. (Xinhua/Fang Zhe)

People visit the China Machine Tool Exhibition at the National Exhibition and Convention Center (NECC) in Shanghai, east China, July 1, 2020. The China Machine Tool Exhibition kicked off here on Wednesday with nearly 1,500 manufacturers from home and abroad participating. (Xinhua/Fang Zhe)

People visit the China Machine Tool Exhibition at the National Exhibition and Convention Center (NECC) in Shanghai, east China, July 1, 2020. The China Machine Tool Exhibition kicked off here on Wednesday with nearly 1,500 manufacturers from home and abroad participating. (Xinhua/Fang Zhe)