An increasing number of luxury brands have chosen to sell their products through WeChat mini programs, which makes it easier and more controllable to provide online shopping services and to avoid the difficulties of finding and loading official websites. Since 2016, luxury brands have taken the lead in WeChat sales and have achieved interesting results. At the same time, under the mode of brands using WeChat mini program for sales, certain problems tend to appear. Whether WeChat is an online trading platform, how to determine the legal liability boundary of platform operators and how to define the ownership and intellectual property of the mini programs, let's discuss these issues in depth.