Review and evaluation of typical modes of eco-agriculture development in Shandong Province Analysis on the sustainable development models of wetland agriculture in China Basic ways and typical models of eco-agricultural county construction in different type areas in China A new approach of ecological agriculture development System analysis of typical models of eoo-agricultural construction in Taihang Piedmont--A case study from Luancheng County of Hebei Produce Study on the typical model of eco-agriculture in Fujian Province