Of the four major key is yongding river flood control, one of the largest water system is the haihe river a river valley, a total area of 47000 km2, Beijing China area of about 3200 km2 river basin, the length of 170 km yongding Beijing period, divided into guanting gorges section, plain for city, the plain country section, flows through MenTouGou, shijingshan, fengtai, fang shan magmatic and daxing five area. Beijing is also the mother river of replica oakleys the yongding, bred the Beijing deep cultural inside information and the unique cultural resources

Facing yongding river basin water, reduce within deteriorated water quality, river ecological environment deterioration, flood control dam from being destroyed. The 1970 s, with the main flood as Beijing yongding river, a certain degree ignored its ecological conservation and urban landscape effect, make yongding and along the coast of the ecological environment deterioration gradually, the serious influence its as Beijing "mother river" image.

As a link of the southwest area yongding ecological link and Beijing important ecological corridor, the development of replica Oakley sunglasses yongding management can not only greatly improve the ecological environment of the southwest, promoting the regional economic value, and carry out in Beijing of city planning, improve the urban ecological environment quality, speed up the construction of Beijing international livable cities has an important role.