As is Singapore's EZ-Link. In fact, you can buy a EZ-Link SINO Visitor Pass, which is both a Singapore EZ-Link card and a Guangdong Lingnan card... I know Hong

As is Singapore's EZ-Link. In fact, you can buy a EZ-Link SINO Visitor Pass, which is both a Singapore EZ-Link card and a Guangdong Lingnan card... I know Hong Kong issues a few cards like this for cities across the border in the mainland. Still, not nearly as impressive as the Japanese system.