1. First, you need to prepare an email address to register your mystyle account.

2. Open the mystyle website and click the "Register" button in the upper right corner of the page to enter the registration page.

3. In the registration page, enter your email address and click the "Send Verification Code" button, and you will receive an email containing the verification code.

4. Enter the verification code you received in the verification code input box, set the password, and then click the "Create Account" button.

5. After creating an account, you can log in to mystyle account, and then select your favorite products on the website.

6. Select the products that permanent members can enjoy a 30% discount, and then click the "Add to Shopping Cart" button.

7. On the shopping cart page, confirm the goods and quantity you want to buy, and then click the "Settle" button.

8. On the settlement page, select your payment method, enter your payment information, and then click the "Submit Order" button.

9. After submitting the order, your 30% permanent membership of MyStyle will be completed.

Please note that the above steps only apply to mystyle website. If you buy 30% permanent membership of MyStyle on other platforms, it may be different. In addition, if you are already a mystyle member, you can buy 30% off the permanent membership products directly on mystyle website.