I am the international sales manager for the cement factory in china.We supply to international market.The factory manufacture both clinker,portland cement and 86-10 API type H cement and type 1 & 2 cement.issued from the factory direct the same day we receive the LOI from the buyer.We will add quality certificate along with the contract to the buyer .After signing the contract, any proof the buyer needs will be sent from the factory in china as soon as possible.