1. EC. China's cross-border e-commerce market data report in 2020, https://www.ec.cn/zt/ 2020kjdsbg/. Accessed 29 November 2022.
2. X.M. Shen, Government Work Report. Hainan Daily, (A01), 2020.
3. The real business of blockchain: How leaders can create value in a new digital age;Furlonger,2019
4. X.M. Zhou, Our province builds a blockchain financial electronic bill application management platform. Hainan Daily, July 23, 2021.
5. Z.Y. Zhu, The nation’s first blockchain “Certificate of Export Goods Agent” was issued in Shenzhen. China News Network, July 26, 2021.