Trusted Yupoo / Weidian / Taobao sellers organised by brand. Click any seller to open their shop. Tap the name to copy the URL.
Find the product you want on the Yupoo page.
Find the Taobao or Weidian link attached to the product page.
If it's a Taobao link, just copy it. If it's a Weidian link, click it to be redirected to weidian.com, then copy it from the browser there.
Paste it into your agent's search field (e.g. Litbuy). Done.