You can register for the 1688 Merchant Festival by following the steps below:

Open the official website of 1688 Merchant Festival (https://activity.1688.com/merchantfestival/index.htm);

Click the "Register Now" button on the page;

Log in to your 1688 account. If you don't have an account, you can register first;

Confirm the registration information, including contact person, company name, contact information, etc.;

Click Submit Registration Information.

Next, you can perform relevant operations and preparations according to the requirements of the event, such as setting up store activities, preparing products, etc. It is worth noting that the specific content of participating in activities and enjoying discounts may vary depending on the region, industry, store, etc. You can check the event rules after registration for more details.