Tsinghua of county of Jiangxi Wu source is pressed down, one is built at carry on of the Southern Song Dynasty to promote 7 years the Christian era the Gu Qiao 1137. Ancient bridge modelling is beautiful, air of of primitive simplicity of charge for the making of sth. , all previous is pounded via the flood that comes hundreds years, up to now still in good condition nondestructive. This Gu Qiao is rainbow bridge. Rainbow bridge, take Li Bai of Tang Dynasty great poet " Qiu Dengxuan city thanks building of north of look into the distance from a high place " medium line " two water place bright mirror, double bridge falls rainbow " meaning and get a name. Rainbow bridge is 140 meters long, 3.5 meters wide, by 6 booth 5 corridor form footbridge of type of a covered corridor or walk, there is bench of stone desk stone in corridor booth, OK and recreational drink tea, still can keep out wind and rain, it is to be saved up to now most complete, design bridge of most scientific an ancient corridor, be known as " one of China's most beautiful corridor bridges " , " Chinese corridor bridge history the out of print that go up " , was labelled 2006 cultural relic of key of the 6th batch of whole nations protects an unit. Of rainbow bridge design, reflected the wisdom of person of archaic Wu source deeply. Rainbow bridge is built in the widest river range, bridge floor uses woodiness more. This is for at that time, be most of economy the most practical. Thick see bridge floor, we can discover, bridge floor structure is quite simple, although charge for the making of sth. is not fine carve of carve of essence of life, but strong and durable. This explains, the to the carpenter craft when bridging asks the level is not high, rainbow bridge is common carpenter place is built. Why to meet such? Wu source belongs to district of ancient badge city, badge city person is in business more, economic standard of place is very correct, wealthy person is very much. The house of home of businessman of source of a lot of Wu, ancestral temple, build very highly fine carve of carve of air, essence, cost much financial capacity labor power. But time is ages ago, the dab hand that finds maintenance is a tickler, can as the history die. But bridging cannot such, forever descendants people should walk. Because this rainbow bridge is built simply,atmosphere of primitive simplicity bears fruit. Such doing, its advantage depends on the bridge bad, can use lowermost price, can find the carpenter of maintenance at any time. Because jump over simple and practical technology,jump over easy inheritance, continuance. Repair a bridge, maintain to facilitate, break up the whole into parts, every booth corridor is independent, won't because of be in bad and affect whole bridge. because of the wright of rainbow bridge such pains accumulates Lv, although already all previous classics snow of rain of hardships of a journey or of one's life, but still complete, of primitive simplicity, massiness, accumulate sense is strong. Between rainbow bridge rabbet firm need not Tie Ding, use nog entirely. Use nog, cost is low, facilitating treatment. Tie Ding is used in build the bridge to go up, rust easily, with wood union is together, the person walks on the bridge, bridge experience produces vibration, tie Ding can wear away wood, the bridge becomes loose easily. The clench that use wood originallies, wood is same property, in vibration, adjustable and identical, went a few years, between the rabbet still close together and firm. The xylem of bridge floor is divided, can save about a hundred years only commonly, so, rainbow bridge past dynasties has been maintained. The closest maintenance is 1985. The wonderful part of rainbow bridge depends on 4 its tremendous pier, pier is half boat form, front abundant acute, submit form of pointed axe of sharp edge acute, local is called " swallow mouth " , can dissolve the flood the wallop to pier. Back end level off, thick certainly, in order to increase stability. There ever was account on local history, the biggest water level is close to bridge floor, the flood is billowy, if mound head is planar, the bridge is destroyed by the flood already. The distance between 4 pier is unequal. The span of pier has very much exquisite, the biggest span is 12.8 meters, the smallest it is 9.8 meters. This kind of design, decide according to the trend of flood season flood. The local mound that mainstream quantity passes is apart from bigger, be helpful for going big, the impact that pier gets is little also; The place with mild current, mound is apart from lesser, get somes pluvial wallop is relatively small. Every pier law of the build by laying bricks or stones between Shi Zhi is quite exquisite also. Pier is to use the bluestone with accident differ size to fold build by laying bricks or stones to be together, gap is little, be united in wedlock very firmly. Because pier interior uses arenaceous stone stuff,this is, once stone occurrence aperture, be pounded by the flood all the year round, pull Dakouzi very easily, arenaceous stone is cleaned out empty, pier can collapse. Want repair difficulty of a pier is great, only catchment, should use more than 10 agricultural sprinkler, day and night is ceaseless pump water, fang Nengqing arrives rock build by laying bricks or stones stone. Accordingly, at the outset wright, do pier very strongly durable, accomplish get sth done once and for ever. The craftsman that builds rainbow bridge still found a place for in downstream river side 100 many a block of stone used as a seat, joined two sides, walk for the person. A block of stone used as a seat traverses a river in, drew a beautiful arc, with rainbow bridge echo each other at a distance. This also is the bridge, the sort of primitive way that puts stone to cross water, close water is gotten very. The tourist that comes round to view and admire is mostly cross a river from corridor bridge, come back from a block of stone used as a seat. The look as far as ones' eyes can see on corridor bridge 4 look, beautiful scenery is picturesque; The carefully on a block of stone used as a seat is careful, one pace one mound. Some closer year come, rainbow bridge takes elegant view, find a view comes before attracting play staffs of many movie and TV. " sparkling red star " , " fetch pulls Liu Qiao to press down " , " rustic preceptress " , " lilac " , " my heart forever " , " spark " , " those who come is a guest " , " the dream answers green river " wait for movie and TV work ever was in. Not only such, still have every year large quantities of painter, art-lover, photographer comes round to seek inspiration, undertake creating.