Tri party trade certificate of origin does not want buyers t

Hello, we are a foreign trade company in Huzhou. We don't have our own factory. The goods are purchased from other factories and then exported to foreign countries by ourselves. In this way, the three-party trade is formed. Now the customers ask us to provide the certificate of origin, but there is a column on the certificate of origin to show the manufacturer's information. For the three-party trade like ours, we certainly don't want to let the country Foreign buyers see the actual manufacturer information, how to display it in this case?