Dalian belongs to the north of my country.

Specific geographical location: Dalian is located at the southern end of the Liaodong Peninsula, on the coast of the Yellow and Bohai Seas, backed by the hinterland of Northeast China, and facing the Shandong Peninsula across the sea. It is an important economic, trade, port, industrial and tourism city on the eastern coast of China.

City Introduction: Dalian has a long history. As early as 6,000 years ago, our ancestors developed Dalian, and it was called Dalian in 1899. During the First Opium War and the Second Opium War, the British army invaded the Dalian area. As the main battlefield of the Sino-Japanese War and the Russo-Japanese War, Dalian suffered two major war disasters in modern history and became a Russian and Japanese colony for nearly half a century.

Dalian has an excellent environment and is known as the "Window of the Northeast", "Pearl of the North" and "Romantic City". It is the window to open up to the outside world and the largest port city in Northeast China; it has successively won the title of International Garden City, China Best tourist city, national environmental protection model city and other honors.

Dalian is the permanent host city of the World Economic Forum (WEF) Summer Davos. It has China's largest agricultural product futures exchange and the world's second largest soybean futures market: Dalian Commodity Exchange. In June 2014, Dalian Jinpu New District, China's tenth national-level new district, was officially established.

The geographical dividing line between the north and the south of my country: the Qinling Mountains and the Huaihe River Line

The Qinling Mountains---the Huaihe River Line is what we often call the geographical dividing line between the north and the south of China. There are obvious differences between the north and south of this line in terms of natural conditions, agricultural production methods, geographical features and people's living customs.

Agriculture and Customs

From the perspective of agricultural production and people’s living customs, the differences between the north and south of Qinhuai are even more obvious. The cultivated land in the north is dry land, and the main crops are wheat and miscellaneous grains, with two crops a year or three crops every two years; the south is mainly paddy fields, and the crops are mainly subtropical economic crops such as rice, sugar cane, and tea. Two or three crops a year. What people usually say is "wheat in the north and rice in the south, boats in the south and horses in the north" is a true portrayal of this difference.

The Qinling-Huaihe River line passes through Gansu, Shaanxi, Henan, Anhui, Jiangsu and other provinces. It is an important geographical dividing line in central and eastern China. Its south and north have important differences in climate, rivers, vegetation, soil, and agriculture. There are significant differences in production and other aspects.

The South pays attention to the construction of river networks to drain and store floods and carry out water and soil conservation. Heavy rains will not flood, and droughts and floods will not cause droughts and droughts for a hundred days. Guaranteed harvest agriculture, so the output of agricultural units is high, and industrial and agricultural production can be guaranteed. , the economy can develop sustainably.

There is no space left for water supply in the north, so natural disasters are prone to occur. Heavy rains are prone to flooding, and no rain is prone to drought, which causes instability in industrial and agricultural production and urban water supply.

Causes

Because there is no attention to water and soil conservation and no space for water to flow out, floods, soil erosion, drought and land desertification are prone to occur, resulting in low average agricultural output and difficulty in water supply. The economy cannot develop sustainably, which has become a turning point for China's economic center to shift from the north to the south. The Central Plains is no longer fertile

Historical significance

Water conservancy construction for the purpose of soil and water conservation is a tradition of the Chinese nation. Since ancient times, there have been legends of flood control by Yao, Shun and Yu. After the Song and Jin wars, the Southern Song Dynasty With the Qinling Mountains and the Huaihe River as the boundaries, the Southern Song Dynasty maintained its tradition. The Jin Dynasty implemented reforms, changing the drought- and flood-protected farmland into contiguous dry land, and using horses instead of boats. This reform resulted in agricultural production relying on the weather and making it unstable. The turning point between rich and poor.

Ordinary people’s misunderstandings

The purpose of converting drought to water is to conserve soil and water, leave space for water, and enhance flood storage and drainage capabilities, not to grow rice; converting drought to water can improve agriculture Increase production, ensure industrial and agricultural production, and solve urban water shortage problems, because floods are also a resource.

The way to ensure harvests during droughts and floods is to build reservoirs, dig deep river channels, and build river networks. The greater the water storage capacity, the stronger the ability to resist natural disasters. Except for Beijing and Tianjin, northern cities have little awareness of river network construction. powerful.