选择30城市TSP问题作为研究对象，解题思路源自于：“由固定点围成的多边形，其面积与其周长成反比（李氏定则）”。-Select TSP 30 city as the research object, problem-solving ideas from: "surrounded by a fixed point of the polygon, the area of its week inversely proportional to (Lee s rule)".