Today is 11th-Nov，the double 11 shopping Carnival refers to the online promotion day on November 11th every year, which originates from the online promotion activities held by Taobao Mall (tmall) on November 11th, 2009. At that time, the number of merchants and promotion efforts were limited, but the turnover far exceeded the expected effect. Therefore, November 11th became a fixed date for tmall to hold large-scale promotion activities. Double 11 has become an annual event in China's e-commerce industry, and gradually affects the international e-commerce industry.