Firstly, login into your AliExpress account (if you don't have an AliExpress account, please sign up one ). And login in Bestdealer, find "Profile" and "Aliexpress Account". Then click "Link".
Then, you will see the page for Authorization. Click "Authorization", the page will refresh and jump to Bestdealer.
You need to click"Apply For Whitelist" to complete the last step. Then click "Submit".
The whole process is done now !