SHANGHAI — Saint Laurent and Miu Miu , both popular in China , have quietly banned shoppers from several Hangzhou subdistricts on their official stores on Tmall, the Alibaba -owned e-commerce platform, after falling victim to a wave of purchase-and-return abuse linked to the city’s booming livestreaming economy. But both brands quickly lifted the bans on Monday since the news was reported by local media a day prior. You May Also Like The bans, first reported by the state-owned local outlet Pengpai, targeted addresses within Hangzhou’s Xiaoshan District’s Yingfeng Subdistrict, Binjiang District’s Xixing Subdistrict and Shangcheng District’s Sijiqing Subdistrict, all of which are known as vibrant influencer hubs where livestreaming companies, individual influencers and talent agencies are based.…