Address in YANG

I had an address in YANG.The title of addresss was "How to sale,the sale skills".I got a lot of successsful examples about
salemen, such as Joe Girard. He was the best car saleman . The cars which he saled were 15000 tottally in his life. He had said
that " You do not sale a car, you sale yourself ". A saleman have to put yourself in other's shones. He offered much serve after
saling a car.In econmic depression,I consider that we have to learn sale skills.If we know much sale knowledge,I will make much
money in the future .