A short article about the bridge. Write in detail about the appearance of the bridge and the history of the bridge.

According to historical data and investigation, in primitive society, my country had single-plank bridges and wooden beam bridges made of several logs arranged in rows. As early as the Warring States Period, single-span and multi-span wooden and stone beam bridges were commonly built in the Yellow River Basin and other areas. The Lan Bridge, built over 300 BC on the Lanyu River in Lantian County, Shaanxi Province, is a representative example of multi-span wooden beam and wooden column bridges. "The Book of Songs? Daya? Ming Dynasty" records for the first time that King Wen of Zhou married a wife and built a pontoon bridge on the Wei River exclusively for the emperor's use. Nearly twenty floating bridges were built on the Yangtze River and Yellow River. The first floating bridge on the Yellow River was built near Linjin Pass in 541 BC. It was built by the descendant of Qin Jinggong's mother-brother. He was afraid of being killed by Jinggong and fled to the Jin Kingdom in a car. The first Yangtze River floating bridge was built by Emperor Guangwu of the Eastern Han Dynasty in 35 AD. The bridge was located on the river between Yichang and Yidu.

The suspension bridge was first created in my country, and the slings developed from rattan ropes and bamboo ropes to iron chains. In the middle of the Tang Dynasty, there was an iron chain suspension bridge, more than 800 years earlier than in the West. The arch bridge was built in the middle of the Eastern Han Dynasty. Its variety of forms and beauty of shape are rare in the world.

Ba Bridge, Luoyang Bridge, Anping Bridge, Hudu Bridge, Shaoxing Bazi Bridge, Yinping Bridge, Chengyang Bridge, etc. are representatives of wooden and stone beam bridges. Xi'an Baqiao was built in the Han Dynasty. It is a wooden beam and stone pillar pier bridge. It uses four circular stone pillars connected with mortises and tenons (with a stone pillar in the middle) to form a stone pillar. Six stone pillars form a light bridge pier, and wooden piers are added on the pier. Beams and laid limestone slab bridge deck. He is the founder of Shizhu Pier.

“The bridges in central Fujian are the best in the world” is a true portrayal of the large number of stone beam bridges built in central Fujian during the Song Dynasty (especially the Southern Song Dynasty). In the 150 years of the Southern Song Dynasty, more than 70 stone beam bridges were built, including four or five long bridges over five kilometers. Anping Bridge, known as "There is no bridge like this in the world", was built in the Song Dynasty from the eighth to the twenty-first year of Shaoxing (1138-1151). It is about 2.5 kilometers long, so it is also called Wuli Bridge. It is built of granite. It is the longest existing ancient bridge in my country. The Hudu Bridge (also known as Jiangdong Bridge) was built in 1240. Its largest stone beam is 23.7 meters long, 1.7 meters wide, 1.9 meters high, and weighs more than 200 tons. Even today, it needs to be mined and transported. , it is also very difficult to erect such stone beams. In May 1979, relevant departments in my country discovered the oldest existing stone beam bridges - the Jinjiang County Bridge and the Small Bridge. Both bridges were built during the Taiping and Xingguo Period of the Northern Song Dynasty (976-984). Shaoxing Bazi Bridge is an urban stone beam bridge from the Song Dynasty. The layout is very clever, which not only ensures water and land transportation, but also does not demolish houses or change streets during construction. Chengyang Bridge is located on the Linxi River in Sanjiang Dong Autonomous County, Guangxi. It is a wooden beam bridge with four spans of stone piers and outstretched arms. It was built in 1916. It has a total length of 64.4 meters and is divided into four bridge holes. Each hole has a clear span of 12.2 meters and a width of 12.2 meters. 3.4 meters, 16 meters high. On the five bridge piers, there are pagoda-shaped and palace-shaped bridge pavilions in the national style. The eaves of the bridge pavilions rise layer by layer, like wings about to fly, magnificent and spectacular. The entire bridge construction does not use a single iron nail or other iron parts. It uses tongue-and-groove joints or bamboo spikes, but the structural connection is very strong. The exquisite bridge construction technology of Chengyang Bridge fully demonstrates the outstanding wisdom and creativity of the Dong people in my country.