1. Log in to Mr. Tintin official website and enter "Mr. Tintin official website" in the browser to open the official website.
2. Choose a course, find the "course" option in official website, and choose the "thinking class" you want to buy.
3. Click Buy to open the "Thinking Class" page, find the purchase link or button, and click Buy.
4. Fill in personal information, and fill in the purchase information according to the page prompts, such as name, contact information, address, etc.
5. Choose payment methods, including Alipay and WeChat payment.
6, payment, according to the page prompts, complete the payment.