Can Xiaomi air conditioner be replaced with an old one after the reservation for 6 18?

Of course. Xiaomi 6 18 air conditioners can be replaced with old ones, but the policies in each sales area are similar. You can take the old air conditioner, purchase invoice, old machine warranty card, purchase receipt and other purchase vouchers, and at the same time bring your ID card to the outlet where you buy the air conditioner to register, and ask if you have the opportunity to enjoy the energy-saving subsidy for trade-in or directly exchange it for a new machine.