WORLD HISTORY

Detailed explanation-1: -According to Robert Temple’s highly-regarded history of Chinese inventions, The Genius of China, the Han Dynasty saw the development of the suspension bridge, a flat roadway suspended from cables, which probably evolved from simple rope bridges developed to span small gorges.

Detailed explanation-2: -Some of the earliest suspension bridge cables were made from twisted grass. Rope made from bamboo, itself a form of grass, was used to hang the Anlan suspension bridge in China, first constructed about A.D. 300.

Detailed explanation-3: -The Shang dynasty emerged in the 17th century B.C.E. as the first true Chinese dynasty. Its boundaries are shown in gray. To guard against flooding by the Yangtze and Yellow Rivers, the ancient Shang developed complex forms of irrigation and flood control.

Detailed explanation-4: -Huang He Valley (or in English, Yellow River Valley) was the birthplace of ancient Chinese civilization, and for that reason is often called “Mother River.” The valley surrounds the principal river of northern China and is at the center of thousands of years of Chinese history.