A city merchant bank insisted on the transformation direction of "refinement, digitalization and big retail" in recent years, made full use of the results of "digitalization", and launched a "big retail" transformation project based on the initial establishment of a big data platform. The bank has made full use of its "digitalization" achievements and based on the initial establishment of a big data platform, launched a "big retail" transformation project, introducing the experience of leading peer systems and focusing on upgrading the big retail system from both the business and system sides.