How to cooperate?

Last night, a customer from Iran contact me. He would like to come to visit us. We had ever meet each other in Iran Oil show. But in order to enlarge the cooperation, he want to visit our factory. Also some other customers would like to appoint third party to audit our factory, or inspect the goods after placeing order. Whatever ways they choose, they can find that we longrun is a reliable supplier to cooperate. How do you want to start? Please contact me: sales00@lrpipefitting.com