First, see if the seller supports 7-day unreasonable return. If yes, you can directly apply for a return. If there is no quality problem, you need to bear the round-trip freight. If it is a parcel, you only need to bear the one-way freight. All freight charges for quality problems shall be borne by the seller. However, if there are quality problems, you need to provide corresponding picture vouchers.
If the seller does not support 7-day unreasonable return, if there are quality problems, the same operation as above. If there is no quality problem, you need to contact the seller first and get the seller's consent before returning the goods.