When Lin learns that he has won the competition to design a new set of masks, he is very happy. He tells Lin that he is just doing what he is supposed to do. Lin asks him if there is anything wrong with his masks. Lin tells him that there is one condition that needs to be added to the contract. The condition says that Lin can sell the masks only to the company that agrees not to sell them to anyone else. Lin says that this condition will protect his control over the masks and will help him to build a good relationship with the company's customers in the future