Doudian and Xuelang are both e-commerce platforms for selling goods and services online, but they have different functions and applicable objects.

Doudian is an e-commerce platform launched by Douyin, mainly for individual entrepreneurs and small and micro enterprises, providing a series of e-commerce services such as opening stores, publishing goods, order management, payment settlement, logistics distribution, etc., aiming to help users carry out self-operated e-commerce business.

Xuelang is a platform focusing on online education and training, mainly for education and training institutions and individual teachers, providing a series of online education services such as online course production, online live broadcast, student management, fee settlement, etc., aiming to help users carry out online education business.

Therefore, the order of opening Doudian and Xuelang depends on your business needs and positioning. If you want to carry out self-operated e-commerce business, you can consider opening Doudian first; if you want to carry out online education business, you can consider opening Xuelang first. Of course, you can also consider the characteristics and advantages and disadvantages of Doudian and Xuelang according to your own business needs and actual situation, and choose a suitable platform for opening.