First, after merging the transportation land in the original two classification systems, add two three-level land categories of pipeline transportation land and street and lane. Second, we should increase the land for charity (including orphanages, nursing homes and welfare homes) within the public building land. Thirdly, considering that there are some idle old homestead and other idle land in the village, it is difficult to classify. Therefore, idle homestead should be added to the residential land as the third class land.