Jiang Yan is located in Sichuan to save Jiang Yan city, be located in Chengdu Campagna western on Min river. It only then build last years of a dynasty or reign of Yu Qinzhao king (make an appointment with BC before 256 ～ 251) , be apart from already had today 2275, it is Sichuan county father and son of viceregal Li Bing organizes built large water conservancy project on the foundation of forefathers turtle sharp cut, still continueing to use now. Jiang Yan building is producing effect more than 2000 years all the time, irrigate prevent or control flood this one mankind's biggest difficult problem and dream developed acme, also make the Chengdu Campagna that suffers flood becomes the " of " the land of abundance of Wo Ye a thousand li, use up to now fill area already amounted to close ten million of town of 30 more than county, area mu. (book movie films writing)Jiang Yan also is a whole world up to now the great water conservancy project that the longest, exclusive keep still is using time to be a feature in order to do not have dam pilot a ship into a harbour. It is world culture bequest, be human civilization wisdom is highest reflect, condensing working people of Chinese ancient time laborious, brave, intelligence an wisdom. The dredge that Jiang Yan administers the greatest wisdom to depend on pair of floods and use, not be blind builds dam to seal, however because of situation dredge, scientific circulate moisture content, sanded depart, have an outlet severally, how to exist in all. The great wisdom that this one project develops feelings of philosophy of idea of concept of science of prevent floods by water control, mankind, culture is perfect body comes out now, let later generations be being admired all the time, cannot surmount on wisdom. Work before more than 2000 years productivity is extremely underdeveloped, the world is in close condition, the visual field of the ancients is very narrow below the circumstance, can have Jiang Yan the project of prevent floods by water control of this kind of great wisdom appears, explain at that time of the advanced sex on Sichuan person mind and philosophical system perfect, it often says now namely not only " century project " , used 22 centuries however, still will perfect continue to use, before it, which project on the world is " bean curd broken bits " ? Who dare say to compare Li Bing more wisdom? (book movie films writing)However Jiang Yan is " extremely brief " project, dilettante likelihood does not look to give the point with great what, as the tourist, jiang Yan did not do not have stunt and window more. Alleged " Aquarius mouth " it is hill body digs a little gap; And " water fish mouth " it is an an aqueduct one divides into two, inside river the river outside mixing; "Flying Sha Yan " flood discharge discharges sand, summertime billabong flood, winter Qing Dynasty strikes arenaceous rock. Look be like too simple, in those days whether project of not quite exquisite figure? To contemporary and character, jiang Yan did not bar high already river large dams, also do not have grand and vast and mighty diversion works, what do the hardest also is one leaves between hill small mouth. There is not dynamite at that time, also do not have engineering equipment, open this allegedly small mouth is to use fire to burn stone heat to water again first hold the post of its blast to crack, of little buckle come out. Namely so small mouth is the most scientific calculate, it sheds the source of water of classics enough Chengdu Campagna is used, redundant did not want, the river outside flowing partly completely and cent went. (book movie films writing)The wisdom that the great place of river lasher project depends on a person and the relation that cannot defy naturally, everything has had with bad two respects, flood is not treated for calamity, flood processing sees wisdom. The project that the person looks Jiang Yan now is least figure, hide deep wisdom however, since it come out, those who await is to praise, do not have a doubt up to now, can says great medium great...Ancestor of more than 2000 years is clever wisdom not only more responsibility and take on, a water conservancy project brings up the Chengdu Campagna of the land of abundance not just, it is the important segment of destiny of China of trend of change China history, change even, it is later the goods and materials of the firmest logistics that Qin Neng unites China assures. The action that someone says it and the action that are put in far outclass Great Wall... (book movie films writing)All these should thank Li Bing father and son, BC 256 years, before 251 years Li Bing is appointed to be Sichuan county by Qin Zhao king viceregal, begin to administer flood, he uses Taoist school " way way is natural " and " day person syncretic " thought, planned as a whole wisdom of prevent floods by water control, built had crossed 22 centuries great project, can calls world prevent floods by water control the first person. But thoughout the history, how many person looks not to know you, again how many person does not want to understand you, jiang Yan is a water conservancy project not only, also should be basis of national policy thought, prevent floods by water control should consider later, treat Sichuan to want later thoughtful. Later, how many to still have later ah. . . . . .