According to the White Paper, as early as 2016, Jingdong Group launched the application exploration and R&D practice of block chain technology in Jingdong business scenario. It has landed in the fields of supply chain, finance, insurance fraud prevention, big data security, government affairs and public domain. Different block chain applications have accumulated a lot of experience in block chain deployment and research and development capabilities of underlying technologies. Pei Jian, Vice President of Jingdong Group and head of Big Data Platform and Product Research and Development Department, said that Jingdong has real business needs of block chains, such as chattel assessment, transaction clearing, second-hand trading, commodity consistency, qualification filing, supply chain traceability, charity, contract forgery, electronic invoice and open API. Zhang Zuoyi, product manager of block chain traceability project in Jingdong Y Business Department, also said that the marginal cost of rebuilding supply chain by block chain is very low, and the brand is very low.