Lexin: Building a closed-loop consumer finance ecosystem

Lexin is a fintech group. Five years from its establishment, Lexin encompasses an e-commerce personal finance platform called Fenqile, an online investment platform for individual investors called Juzi Licai and an open source asset management platform called Dingsheng Assets. Lexin now has all the makings of a closed-loop ecosystem. How was this created, and what risks and challenges does Lexin face?