Does Midea air conditioner need an invoice after sale?

Midea air conditioner needs an invoice after sale. Midea's air-conditioning invoice is an important basis for the three guarantees of air-conditioning products after sale. Among them, the three-warranty period of the air conditioner is the whole machine 1 year, and the main components (compressor, fan motor and thermostat) are 3 years, and the three-warranty period is calculated from the date of invoice issuance. Within 7 days from the date of sale, air-conditioning products have performance failures, and consumers can choose to return them.