In the mood for love, how to test the authenticity?

In "In the Mood for Love", the method of checking the authenticity of the box is:

1. If users buy goods online, they can contact the store customer service to show their authorization certificate. E-commerce merchants will have corresponding product sales authorization certificates, and the authenticity can be preliminarily determined through the authorization certificates.

2. There will be a Chinese label on the back of the regular products sold in China, and the Chinese label will have the contact number of the manufacturer. Just call and tell me where to buy it. The manufacturer needs to check whether it is their distributor or not and whether the product is genuine. Factory customer service will generally tell the answer patiently.