Go up to the cadres and down to the masses. "Six-level linkage" means that Laiwu District adheres to the guidance of party building and makes full use of management grid. The six-level linkage of subway is to establish a "six-level linkage" social governance system with the framework of "district leaders, town and street cadres, village and community cadres, party leaders and party member people". Through linkage step by step, linking up and down, and shifting the center of gravity, Party organizations at all levels and party member cadres can contact and serve the masses.