The government follows statutory process to obtain some specific private land by expropriation on the basis of the needs of public business. After re-planning and re-development, except for the land needed for public facilities which will be directly controlled and used by the government, part of the construction land can be taken back by the original landowners, and the rest part is for the use of urban development, so as to promote land utilization in that district, and to achieve the goal of sharing land profits.