THE CHINKING OF PLANNING AND CONSTRUCTION OF VALLEY-CITY'S FRINGE AREA IN HILLY REGEION OF LOESS PLATEAN——Take The South Bank of Yan River in Yan'an for Example
STUDY ON THE SPATIAL STRUCTURE QUALITIES OF NATURAL ENVIRONMENT AND CULTURAL ECOLOGY ENVIRONMENT OF ANCIENT CITIES——A Case Study of Tongren Ancient City, Gansu Province
STUDY ON RELATIONSHIP BETWEEN THE CHANGES OF CITY GROUP STRUCTURE AND THE DISTRICT'S ADMINISTRATIVE ADJUSTMENT——A Case Study of the North-central Districts in Ningxia