Can the Xiamen e-Tong card be used in Hong Kong?

The Xiamen e-Tong card cannot be used in Hong Kong. Xiamen's e-Tong card can currently only be used in Xiamen and some cities surrounding Xiamen, but cannot be used in Hong Kong. However, Hong Kong has its own public transport card system - Octopus. Octopus is the main public transportation payment tool in Hong Kong. It can be used in public transportation in Hong Kong, as well as in some shopping malls, self-service vending machines and other places. If you are traveling to Hong Kong, you can buy an Octopus in Hong Kong and use it to take public transportation. Octopus can be used in some cities in mainland China (such as Shenzhen, Guangzhou, Zhuhai, Beijing, Shanghai, Chengdu, etc.) and some places in Macau (such as hotels, airports, shopping malls, etc.).