A large number of mainland Chinese companies hoping to list shares on the Hong Kong stock exchange are anxiously waiting for a nod from the mainland securities regulator, with many now at risk of having their listing applications lapse. More than 430 companies were currently waiting in the initial public offering (IPO) pipeline, according to data from bourse operator Hong Kong Exchanges and Clearing (HKEX). More than 30, including mainland supermarket chain Qiandama and EVE Energy, a...