During the periods of “Warring States,” Chinese government had already set up laws to protect those pregnant birds, beasts, fishes, and turtles, which need to lay eggs. With the idea to endlessly utilize our natural resources and materials, government had clear and detailed regulations for closing hillsides to facilitate the forestation. On the one side, the construction of the ecological preservation focuses not on how to beautify, embellish, and glorify the scenery of the protecting embankment. On the other side, those artificial constructions should definitely not be built on riverbeds and channels. Or else, riverbeds may not be able to stand the scouring that the enormous flood brings to them. The recover of the rivers’ cache should consult with the original natural mode and features of the river and creek. First of all, one has to have the fundamental idea of the environmental demand of the cache. Following one essential principle to interfere the original natural environment as less as possible, one has to take advantage from the characteristic of the river and its waterpower. By borrowing and making use of its strength, we can let the river to restraint the sand in accordance with the capacity of upper reaches. In the end, it subsequently can adjust itself to diversify the cache environments. And this anticipation could be put into practice and attained only through the flawlessly cooperation of experts in animal, plant, ecology, water conservancy, and geology.

      　 For example, the renovation of rivers and creeks should not simply consider one area. On the contrary, one should wholly evaluate the upper, middle, and low reaches area. Only in this way, can we effectively renovate rivers and creeks. From the ecological viewpoint, the construction for humankind’s business affairs should be reduced a little bit. If not, our natural environment may suffer from great shocks that people’s financial activity brings to it. In order to enhance those professional engineer’s and workers’ comprehension about the ecological knowledge, during the course of planning and constructing the project, we undoubtedly ought to rely on the environmental consultation that those ecological experts provide for us. Accordingly, it’s very important for the group of ecological preservation to have an ecological expert to offer his team a constructive recommendation. There is beyond doubt that he does play a very important role in this teamwork.