Core Viewpoint - The Shenzhen Metro is currently not compatible with the Lingnan Tong card, which has been in circulation for over a decade, despite the Shenzhen public transport system supporting it. There is a public request for the metro to adopt this card for convenience in cross-regional travel [1][2]. Group 1 - The Ministry of Transport initiated a national transportation card interoperability standard in 2019, which has been rapidly promoted across the country, achieving connectivity with over 300 cities, greatly facilitating cross-regional travel [2][3]. - There are significant technical standard differences and weak system compatibility among local transportation cards issued across various regions. Implementing compatibility with the Lingnan Tong card on the existing Shenzhen Metro system would require substantial hardware upgrades and software modifications, involving a massive resource investment [2][3]. - For passengers needing cross-regional public transport, it is recommended to contact the issuing unit of the Lingnan Tong card to obtain a card that supports the "Transportation Union" standard, allowing convenient travel across many cities, including Shenzhen [2][3].

Core Viewpoint - The Shenzhen government has responded to a public suggestion for the integration of Lingnan Tong with the Shenzhen Metro, indicating that technical compatibility issues exist and recommending the use of the "Transportation Union" card instead [1] Group 1: Government Response - The Shenzhen Municipal Government's State-owned Assets Supervision and Administration Commission stated that achieving compatibility with Lingnan Tong is technically challenging [1] - The government suggests using the "Transportation Union" card, which has been promoted since 2019 to facilitate intercity travel across China [1] - The "Transportation Union" card has been successfully integrated with over 300 cities nationwide, enhancing convenience for cross-regional travel [1] Group 2: Technical Challenges - Local transportation cards exhibit significant differences in technical standards and weak system compatibility [1] - Implementing compatibility with the existing Shenzhen Metro system would require extensive hardware additions and software upgrades [1] - The modification would involve substantial resources and equipment across the entire network, making optimal configuration difficult to achieve [1]