China iTunes Cards are specifically designed for accounts registered in the Mainland China App Store. They are primarily used to purchase mobile games (in-app purchases), subscribe to services like Apple Music (China region), and buy digital content such as movies or iCloud storage. It is critical to note that these cards cannot be used on accounts registered in other regions (e.g., US, UK, or Hong Kong). Buyers must ensure their end-users have a valid Chinese Apple ID and are compliant with local real-name authentication requirements.