Hakka is a kind of household registration in China's ancient household registration system, which generally refers to non-indigenous households. It is not a unified class or stratum, including landlords, yeomen, urban vendors and unemployed people. Customers or clients can refer to natural persons or organizations that accept property, services, products or ideas in exchange for money or something of value. Buyers of commercial services or products may be the final consumers, agents or middlemen in the supply chain.
Traditionally, customer and consumer are the same concept, and their meanings can be indistinguishable. But for enterprises, customers and consumers should be distinguished. Customers focus on specific market segments, and their needs are concentrated; Consumers are aimed at individuals, and their needs are scattered.