No, the cards of Lianhua Supermarket and Hualian Supermarket are not interoperable. Because Lianhua Supermarket belongs to Beijing and Hualian Supermarket belongs to Hangzhou, they are two different supermarkets. Although the names of supermarkets are somewhat similar, they are two independent companies. Therefore, the cards of Lianhua Supermarket and Hualian Supermarket cannot be used universally, unless the two companies are merged into one company, and the supermarket system is merged into one system, and the members of both parties share information. This situation is interoperable.