Navigate to your TomTop affiliate profile.
All you need is to copy that Affiliate ID, open extension options, go to Platforms / Chinese / Other, and paste Affiliate ID in the TomTop field.
Then close options, find the product on TomTop you want to share and click on the extension icon. It will generate an affiliate link for that page. Then you can use bit.ly to shorten that link (if configured) or copy and share it.