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But Amazon revolutionized retailing, as evidenced by the continued growth of online sales and a long list of bankrupt brick-and-mortar chains, including Toys 'R' Us, Sports Authority and Borders Books.

Both the mainland and Hong Kong have recently expanded such exchange programs with the aim of carrying forward national spirit, cultivating the concept of the State and establishing friendships. To date, more than 7,000 young people from Hong Kong have joined the program and traveled to 13 mainland provinces and cities.

Breast cancer is the most common malignant tumor among Chinese women, with about 272,000 new cases reported in China in 2015. More than 71,000 people died of breast cancer that year.

Brazil is one of the countries hardest hit by COVID-19, second only to the United States, with more than 3.6 million cases and 116,580 deaths, according to the Ministry of Health's latest report on Tuesday.

Businesses of e-commerce, social networks and games contributed over 80 percent to the companies' revenue, according to the report.