This Recommendation specifies the application guideline of financial distributed ledger technology (DLT). It provides: - General principles from five aspects; - Reference architecture from both the participant and conceptual architecture views; - Technical requirements, including functionality, performance, security, governance, maintenance, auditability and interoperability; - Use cases in trade finance and supply chain finance to illustrate how DLT can be used more reasonably and effectively for financial applications according to this guideline.