Navigate to your DHGate affiliate profile.
All you need is to copy that Affiliate ID, open extension options, go to Platforms / Big Chinese stores, and paste Affiliate ID in the dhgate field.
Then close options, find the product on DHGate 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.