6.The Han nationality distribute all around the country, mostly in the downriver of three drainage area that is Yellow River, the Changjiang River and the Zhujiang River and the northeast campagna.
7.Constructing Forest Ecosystem of Taihang Mountain plays an important role in protecting ecology safety and improving manufacturing and life environment of Campagna of North-China and the area of Beijing and Tianjin.
8.In high altitude mountainous ecological type of maize variety, the nap of scarfskin was less and shorter, the pore of leaves was less and smaller, and all of the other important physiological indexs such as the chlorophyll contents, specific leaf area, dry matter weight, the rate of transfer, the rate of pholosynthesis, net assimilatory rate, the ratio of kerlel and leaves were lower, but the milking speed was quicker than that of campagna ecological type of maize variety.
