In the beach inside park of ancient crater of city of sea of dragon of city of Fujian Province Zhangzhou, an old farmer is curved waist resembles kind of agrarian Tian Yi on the sanded ground in the seaside. Be drawn by this old farmer on beach full line, resemble be like the cropland that has been ploughed, it is an organic whole with sea be in harmony. Old farmer extends beach sandy soil with a self-restrained tool in, push backward ceaselessly, turn over sandy soil from time to time, the movement follows agrarian cropland very similar. The graph is the impress that is given n cultivated land by old farmer on beach, it is an organic whole with Hai Tianrong, it is grand very. The author is moved close to look, former old farmer is the clam in searching sandy soil. The tool in his hand is pulled backward in sandy soil, after coming up against the crust with hard clam, turn over sandy soil to find among them clam. The graph uses self-restrained tool to search clam on beach for old farmer. As we have learned, old farmer can find many clam everyday through this kind of simple method. The graph searchs the tool of clam for old farmer.