Recently, the IC card application service centre of the Ministry of Housing and Urban-Rural Development issued the Notice on Taking Certain Measures to Promote the Upgrade of City One Card System and Accelerate the Replacement of M1 Card by CPU Card ("Notice"), which requires that from January 1, 2014, the new procurement of city one card operators who are still using M1 card The M1 card control expiry will be set uniformly in the security authentication card, and its limitation control time will end on 31 December 2018, and the security authentication card will only support CPU card applications from 1 January 2019.

　　City One Card is the main component of Chinas urban digitalization and informatization construction, and its application has involved nearly 40 different fields such as bus, metro, taxi, water supply, gas, and even social security and finance. In recent years, the M1 card has been used in some of Chinas cities as a security tool, causing unnecessary problems for cardholders and operators. The Ministry of Housing and Urban-Rural Development IC Card Application Service Centre issued a Notice to speed up the replacement of M1 cards with CPU cards, which will not only enhance the security of the city card industry, but also have great significance in accelerating the pace of the national city card construction.

　　In July 2012, the Ministry of Housing and Urban-Rural Development IC Card Application Service Centre was responsible for promoting the implementation of the "National City One Card Interoperability" project, which allows local city cards to be used off-site between connected cities. According to a cartoon world network, to join the national city card interoperability platform should not only use the unified standard system and security key system of the Ministry of Housing and Urban-Rural Development, the user card should also adopt the CPU card chip that meets the national industry standard and is tested and certified by the IC card application service centre of the Ministry of Housing and Urban-Rural Development.

　　At present, more than 160 cities across the country are building projects in accordance with the Ministry of Housing and Urban-Rural Developments IC card standards, and a total of 35 cities have joined the national one-card interoperability platform, which is expected to expand to 60 by the end of the 12th Five-Year Plan. The Notice will accelerate the number of cities joining the interoperable platform and expand the number of interoperable cities, which will have a positive effect on the interoperability of the national urban one-card