Babbitt News, on November 1st, Harbin traveled to announce the access to the "Double Chain Link" developed by Ant Financial and the Bank of China. The upstream suppliers were able to rely on the release of Harbin's "Double Chain Link". Account voucher, which can be directly obtained from the bank. "Double Chain Link" is a supply chain collaboration network based on blockchain technology of Ant Financial. Through the use of blockchain technology and online merchant bank credit technology, the financing time cost of small and micro enterprises can be changed from three months. In 1 second.