Six difficult problems in Chengdu-Chongqing-Guiyang-Nanning urban economic zone

The strategic idea of Chengdu-Chongqing-Guiyang-Nanning urban economic zone leads to the 干 form economic growth pole, i.e. Economic Zone at Upper Reaches of Yangtze River plus Nanning-Guiyang-Kunming economic zone plus Chengdu-Chongqing-Guiyang-Nanning urban economic zone. There are many difficult problems in construction of Chengdu-Chongqing-Guiyang-Nanning urban economic zone such as imbalance of urban structure, low level of division of industry, borderline of cities and so on, which influences the mutual construction of Chengdu-Chongqing-Guiyang-Nanning urban economic zone and should be solved.