Xu Yangtian, the low profile founder and chairman of online retail giant Shein, which sought to distance itself from China by moving its headquarters to Singapore, made his first-ever public appearance on Tuesday, praising southern Guangdong province’s role in the company’s global success.Dressed in a black suit and burgundy tie, Xu, also known as Sky Xu or Chris Xu, pledged to “continue to take root in Guangdong” by investing over 10 billion yuan (US$1.4 billion) to build a “smart supply chain...