Fix a signature problem for 1688.com in Postman -- 2

Hello, I need someone who knows and understand the 1688 open api to enable the signature part in Postman and maybe more. Probably a quick and easy job for now, but might open for more later when more help is required with the api :-)
Thanks!

Looking to start it now, so if you are online right now, you might get the job directly!
Real knowledge of 1688 API and Chinese is *very* important!!!