What is the development history of Shenzhen?

The development history of Shenzhen is:

The earliest predecessor of Shenzhen was Baoan County, guangzhou fu. The place name "Shenzhen" first appeared in historical records in 14 10 (the eighth year of Yongle in Ming Dynasty), which was built in the early years of Qing Dynasty. The local dialect usually calls the ridge ditch "town" or "surge". Shenzhen is named for its dense Shui Ze and deep ditch beside the village.

Although the development history of Shenzhen Special Economic Zone is only over 40 years, it has a history of more than 6,700 years of human activities (aborigines lived in Shenzhen in the middle of Neolithic Age), 6,000 years of human development and marine economic development, 1700 years of urban development, 600 years of coastal defense, and a long history of Guangfu clan and Hakka immigration.

Historically, Baoan County (Xin 'an County), the predecessor of Shenzhen, has four ethnic groups: Hakka, Guangfu, Fulao and Yi, among which Hakka is the majority. In the pre-Qin period, Guangdong was inhabited by ethnic minorities called "Nanyue", including Zhuang, She and Yi. Shenzhen is the foothold for South Vietnamese tribes to explore the ocean. The Nanyue tribe living in the coastal dune valley area of Shenzhen makes a living by fishing and sailing, and rarely cultivates.

The geographical environment of Shenzhen:

Shenzhen is a coastal city in the south of China, adjacent to Hongkong. Located in the south of the Tropic of Cancer, east longitude 1 13 43' to1/4 38', north latitude 22 24' to 22 52'. Located in the south of Guangdong Province, on the east bank of the Pearl River Estuary, bordering Daya Bay and Dapeng Bay in the east; West of the Pearl River Estuary and Lingdingyang; The Shenzhen River in the south is connected with Hong Kong; It borders Dongguan and Huizhou in the north. Urban area 1997.47 square kilometers.

Shenzhen is surrounded by mountains and seas, with more than 60 rivers 160, belonging to Dongjiang River, Bay and Pearl River Estuary, but the rainwater collection area and flow are not large. There are five rivers with basin area exceeding 100 square kilometers, including Shenzhen River, Maozhou River, Longgang River, Guanlan River and Pingshan River.