Skills are worthless. Li Daitao's rigid plan is just to take a price he intends as a non-existent purchase price, and subconsciously tell the other party: I won't sell it to you if you are lower than this price.

it's easier to crack, just find a salesman who is familiar with the market.

PS: now which person in charge will admit that it is unlucky to reach a supply and marketing agreement at a high price?