National warranty, pinyin is quá nguó liá nb \ uoo, which means that the nearest after-sales service outlets in any area of China can enjoy maintenance or upgrade services.
It can realize "one-time purchase and national warranty", thus solving the problem of "local maintenance and convenient maintenance nearby" for users. In the past, consumers had to follow the principle of where to guarantee the machine, which made consumers feel extremely inconvenient and could not guarantee the normal warranty of the machine at all. However, after the implementation of joint guarantee, consumers can choose the designated maintenance station for warranty no matter where they purchase the machine.