Lin Bu lived in seclusion in Xiaogushan, West Lake, Hangzhou in his later years. Three hundred and sixty-five plum trees were planted on the mountain. Weeding, fertilizing and hard work on weekdays. When the plums are ripe, crowds of vendors come to buy his plums. He sells plums not by weight, but by the weight of each plum tree, and the valuation is fair. So the vendors like to buy his plums. He also prepared 365 bamboo tubes, put all the money sold by each tree into bamboo tubes and numbered them. Whether there are guests or no guests, or more guests and fewer guests. Live with the money of a bamboo tube plum a day, and never need a penny again. He also keeps two white cranes. When the guest came, Mr. Wang whistled, flew in and stood in front of him. He put the money and the note in a bag and hung it around the crane's neck so that the crane could fly to the city to buy fish, food and wine. When the vendors saw the crane flying in, they knew that Mr. Wang had a visitor, so they paid the money according to the goods written on the note and returned it to the crane.