Flagship stores are generally monopolized by a certain brand. You must have a brand authorization certificate to buy and open flagship stores. So in general, everything in the flagship store is genuine.
The flagship store audit process is very complicated, which requires product quality inspection report, trademark certificate, etc. Most flagship stores can rest assured. If they are not at ease, they can look at the evaluation and consider buying in multiple dimensions.
7-day unreasonable return is a must for businesses, and you can generally rest assured.