Under the guidance of the State Administration of Taxation, Guangzhou Municipal Taxation Bureau, Guangzhou Metro issued the first blockchain electronic invoice on January 1, 2020, marking the application of blockchain electronic invoice in the public transportation industry in Guangzhou. It is expected that 1 Before mid-month, it will be launched on the Guangzhou Metro official app. The integrated application of blockchain technology plays an important role in new technological innovations and industrial changes. The implementation and promotion of blockchain invoices will further facilitate the general public to issue invoices when riding subways. Guangzhou Metro said that the current invoice function is still in the process of debugging, and will speed up the system's function debugging and improve the invoicing function in the future. More efficient, better, and smarter travel experiences.