Margaret egg tart shop buys Portuguese egg tart patents and secret recipes. There are countless shopping malls and bakeries in China that also sell orders and tarts, but many of them are not in Portuguese, and even the "cracked version" is different from the main secret recipe.
Secondly, KFC has strict product quality control. Portuguese egg tarts can only be kept for 90 minutes after being baked in the oven. If they are not sold within 90 minutes, they will be discarded. This is due to KFC's strict product calling system, which is incomparable to those bakeries that bake all morning and sell for a whole day or even two.
Third, the open dining environment provided by KFC allows you to be in a clean, bright, wide, moderate temperature and rich atmosphere. As the saying goes, value for money.