On August 26th, Ant Financial Co., Ltd. announced that the supply chain collaboration network based on blockchain technology, the ant blockchain "Double Chain Link", has been fully upgraded and opened. This service uses blockchain technology to solve the trust problem in supply chain finance, and allows small and micro businesses to enjoy efficient and convenient financial services. Currently, this model has been applied first in Chengdu. Through cooperation with Chengdu Commercial Bank and Chengdu SME Finance Guarantee Company, “Double Chain Communication” completed the full link coverage of supply chain finance. After the winding, the entire financing process will be clearly marked and cannot be tampered with. All participants must pass the “Double Chain Link” for identity verification and willingness to confirm, and the digital signature will be chained in real time to prevent risks such as misappropriation of funds.