https://www.reuters.com/article/us-xiaomi-ipo/chinas-xiaomi-files-for-mega-hong-kong-ipo-lifts-lid-on-financials-idUSKBN1I403A >Smartphone and connected device maker Xiaomi [IPO-XMGP.HK] filed for a Hong Kong initial public offering on Thursday, in what is expected to be the largest listing by a Chinese tech company in almost four years.