A bridge is a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the obstacle. There are many different designs that all serve unique purposes and apply to different situations. Designs of bridges vary depending on the function of the bridge, the nature of the terrain where the bridge is constructed, the material used to make it and the funds available to build it.
Shenzhen (Chinese: 深圳; pinyin: Shēnzhèn Mandarin pronunciation: [ʂə́ntʂə̂n]) is a major city in the south of Southern China's Guangdong Province, situated immediately north of Hong Kong. The area became China's first—and one of the most successful—Special Economic Zones (SEZs). It currently also holds sub-provincial administrative status, with powers slightly less than a province.
Shenzhen's modern cityscape is the result of the vibrant economy made possible by rapid foreign investment since the institution of the policy of "reform and opening" establishment of the SEZ in the late 1979, before which it was only a small village. Both Chinese and foreign nationals have invested enormous amounts of money in the Shenzhen SEZ. More than US$30 billion in foreign investment has gone into both foreign-owned and joint ventures, at first mainly in manufacturing but more recently in the service industries as well. Shenzhen is now considered one of the fastest-growing cities in the world.
Being southern mainland China's major financial centre, Shenzhen is home to the Shenzhen Stock Exchange as well as the headquarters of numerous high-tech companies. Shenzhen is also one of the busiest container ports in China.