In the urban tourist resource collaborative development in the Yangtze River Delta,the main principles include:across-regional integrative development,mutual advantage complementary,sharing the haves and haves-not,timely and broadly layout,and eco-environmental protecting,tourist resource regional development,etc.

The paper analyses urban tourism resources development principles, probes into market demand-oriented urban tourism resources development model and suggests an obscure comprehensive multilevel evaluation model of urban tourism resources be set up.

Indeed,it is in inferior positions for non-optimal tourism areas in the regional development under market competition.

In recent years, it is common to see tourism development in those so-called non-optimal tourism areaswhere both tourist resources and high quality tourist resources are lack.

Sustainable tourism development of non-optimal tourist districts: A case study of the City of Wuhu in Anhui;

The present study of the non-optimal tourist districts is on the rise,and this research will pay attention to the western typical non-optimal tourist districts.

As one of the less developed areas in Shandong province, Dezhou is also non-optimal tourism resources area comparing to other cities in Shandong, so it s a typical non-optimal tourism resources and less developed areas.