Key Takeaways:In its recent application for a Hong Kong IPO, Dmall revealed that its top five customers account for nearly 90% of its revenuePre-IPO backers of the provider of software as a service for retailers include Tencent and Industrial Bank, as the company continues to report big lossesBy Bai Xinrui Its bread and butter is providing ordinary products to consumers. But these days, retailing major Weimei Group is courting a different group of buyers, namely investors, hoping to seize on recent stock market rallies in Hong Kong and on the Chinese Mainland. First, Wumei founder and supermar…