Opening a cross-border e-commerce store requires the following steps:

1. Choose a platform: Choose a cross-border e-commerce platform that suits you, such as Amazon, eBay, etc.

2. Register an account: Register an account on the platform and provide relevant information and certificates.

3. Choose products: Choose suitable products based on your interests and market demand.

4. Find suppliers: Find suppliers through the Internet or exhibitions, and establish cooperative relationships with them.

5. Deal with tariffs and taxes: Understand the tariff and tax policies of relevant countries and deal with them.

6. Design and put products on the shelves: Design product pictures and descriptions, and put products on the shelves in the store.

7. Promotion and marketing: Carry out online and offline promotion and marketing to attract more customers.

8. Manage orders and logistics: Process orders and manage logistics in a timely manner to ensure customer satisfaction.

It should be noted that to open a cross-border e-commerce store, you need to understand relevant laws, regulations and policies, abide by platform rules, ensure product quality and service quality, and improve customer satisfaction.