1. What is a cryptocurrency, and how does it work. [EB/OL]. (2022) [2022-09--25]. https://www.kaspersky.com.cn/resource-center/definitions/what-is-cryptocurrency.
2. Ethereum. Ethereum Whitepaper. [EB/OL]. (7/10/2022) [25/9/2022] https://ethereum.org/en/whitepaper/2022 / 09 / 15 Announcement on completion of Ethereum merger. [EB/OL]. (2022) [2022-09-26]. https://help.tokenpocket.pro/cn/announcement/announcement/merge-over
3. Sequoia. Investor Relations. [EB/OL]. (27/9/2022) [27/9/2022). https://www2.asx.com.au/markets/company/seq
4. Sequoia homepage. [EB/OL]. (1972) [2022-09-27]. https://www.sequoia.com.au/
5. Huidu Technology. Shenzhen Huidu Technology Co., Ltd. [EB/OL]. (2009) [2022-09-27]. https://www.huidu.cn/about/157.html