1. To recommend friends in need, you can provide the customer with a recommendation link or QR code, invite friends to apply for the credit card, and you will receive rewards after the recommendation is successful.

2. Send out promotional materials. You can mail promotional materials to potential users, such as color pages, brochures, etc., to help customers understand the credit card product and attract them to join.

3. Carry out publicity and promotion through various channels such as TV advertisements and online media advertisements to let more people know about credit card products.