A man wearing a face mask walks past a shopwindow with discount signs in Brussels, Belgium, Aug. 1, 2020. Belgium's 2020 summer sales were launched on Saturday and will end on Aug. 31. This year's summer sales were postponed by one month due to the COVID-19 outbreak. (Xinhua/Zhang Cheng)

Customers wearing face masks shop at a shopping mall in Brussels, Belgium, Aug. 1, 2020. Belgium's 2020 summer sales were launched on Saturday and will end on Aug. 31. This year's summer sales were postponed by one month due to the COVID-19 outbreak. (Xinhua/Zhang Cheng)

A man wearing a face mask walks past a shopwindow with discount signs in Brussels, Belgium, Aug. 1, 2020. Belgium's 2020 summer sales were launched on Saturday and will end on Aug. 31. This year's summer sales were postponed by one month due to the COVID-19 outbreak. (Xinhua/Zhang Cheng)

A shop staff member posts a sales sign in Brussels, Belgium, Aug. 1, 2020. Belgium's 2020 summer sales were launched on Saturday and will end on Aug. 31. This year's summer sales were postponed by one month due to the COVID-19 outbreak. (Xinhua/Zhang Cheng)

Customers wearing face masks wait to enter a shop in Brussels, Belgium, Aug. 1, 2020. Belgium's 2020 summer sales were launched on Saturday and will end on Aug. 31. This year's summer sales were postponed by one month due to the COVID-19 outbreak. (Xinhua/Zhang Cheng)

A man wearing a face mask walks past a shopwindow with discount signs in Brussels, Belgium, Aug. 1, 2020. Belgium's 2020 summer sales were launched on Saturday and will end on Aug. 31. This year's summer sales were postponed by one month due to the COVID-19 outbreak. (Xinhua/Zhang Cheng)

A shop staff member posts a sales sign in Brussels, Belgium, Aug. 1, 2020. Belgium's 2020 summer sales were launched on Saturday and will end on Aug. 31. This year's summer sales were postponed by one month due to the COVID-19 outbreak. (Xinhua/Zhang Cheng)

A woman wearing a face mask shops at a shopping mall in Brussels, Belgium, Aug. 1, 2020. Belgium's 2020 summer sales were launched on Saturday and will end on Aug. 31. This year's summer sales were postponed by one month due to the COVID-19 outbreak. (Xinhua/Zhang Cheng)

A woman wearing a face mask walks past a shopwindow with discount signs in Brussels, Belgium, Aug. 1, 2020. Belgium's 2020 summer sales were launched on Saturday and will end on Aug. 31. This year's summer sales were postponed by one month due to the COVID-19 outbreak. (Xinhua/Zhang Cheng)