CGPO, short for Controlled and Guaranteed Production of Origin, is an App that helps users (warehouse keepers, purchasing agents and partners of CGPO) to manage the whole process of warehouse operations such as out-put, in-put and put-away of their warehouse. The users can trace and track the product information and locations by simply scanning the barcodes and uploading photos during the process of operations. It is the only traceable certificate to make sure purchasing agents provide certified products in the place of origins without any swaps.