tttttChinau2019s biggest online shopping celebrity has vanished from Alibabau2019s ecommerce platform Taobao after authorities fined her for tax evasion, in a big blow to the ecommerce giantu2019s fight to dominate the growing market of livestream shopping. Huang Wei, known online as u201cViyau201d, had her account on Taobao taken down after being fined Rmb1.34bn ($210m) by the tax office of the city of Hangzhou on Monday for under-reporting income made from promoting goods to her 13m online fans.With the suspension of Viya, u201cTaobao has just lost its core competitiveness in livestream ecommerceu201d said Li Chengdong, head of the internet think-tank Haitun,...