The so-called "one-stop service" actually means that as long as the customer has demand, once entering a certain service site, all problems can be solved, and there is no need to find a second one. Its essence is the system sales service. Originally the business concept of European and American countries, in order to win consumers, businesses continued to expand the scale of operations and product types, and do their best to meet consumers' shopping needs without running around.
Simply put, it is that the merchant has a sufficient supply of goods to allow consumers to buy everything they need in a store.