Geographical literature: The Yellow River is about 5,464 kilometers long and its drainage area is about 795,000 square kilometers. It is the second longest river in China and the fifth longest river in the world. It originated from Kariqu at the northern foot of Bayankala Mountains in Qinghai Province, showing a "few" shape. It flows through Qinghai, Sichuan, Gansu, Ningxia, Inner Mongolia, Shanxi, Shaanxi, Henan and Shandong provinces and finally flows into the Bohai Sea.

Historical records show that from 3000 BC to 2000 BC (Yangshao culture in the Yellow River valley to Yinxu in Anyang), the geographical environment of the Yellow River valley was suitable for the growth of vegetation and the development of human production and living activities, and the climate environment about 2℃ higher created excellent conditions for the development of crops and vegetation. During this period, there were a large number of lakes such as Leixiaze and Onoze in the middle and lower reaches of the Yellow River. "On Mencius and Teng Wengong" once recorded that the Yellow River valley was "lush with vegetation and animals", and there were still "beautiful mountains and rivers, criss-crossing rivers and talented people" in Guanzhong Plain until the Warring States Period in China.

Poem: 1, single wood, yellow river in the sky. -Wang Wei's "Send Wei Taishou to his post" 2. The Yellow River has flowed since ancient times, and now it is cultivated land. All roads are flexible, and the sea turns to dust. -Yuan Dynasty poet Sadulla's Crossing the Yellow River Embankment 3. The desert is lonely and straight, and the long river sets the yen. -Wang Wei, "To the Frontier" 4. The mountains cover the day, and the sea drains the golden river. By going up one flight of stairs sees thousands of miles away-Wang Zhihuan is at Heron Villa 5. Have you ever noticed how the water of the Yellow River flows out of heaven and into the ocean, never to return? -Li Bai's "Into the Wine" 6. Wan Li remembered the Yellow River entering the East China Sea. -Li Bai gave Pei 7 back for the fourteenth time. The Yellow River is far above the white clouds, an isolated city, Wan Ren Mountain. Why use the elegy of willow to complain about the delay of spring, old Yumenguan, a spring breeze is not blowing! -Wang Zhihuan's "Liangzhou Ci"

Idiom: Winning the Central Plains: Q: Q: Ding: an ancient cooker with three feet and two ears. It is said that Yu Xia forged Jiuding, representing Kyushu, as a symbol of state power in ancient times. During the Xia, Shang and Zhou Dynasties, Jiuding was an important weapon to spread the country, which was owned by those who won the world. Central Plains: The middle and lower reaches of the Yellow River refer to the territory. Metaphor is an attempt to seize the world.

Myth and legend: Hebo Feng Yi was ordered to harness the Yellow River, but he never cured it in his whole life. When he was old, he waded through mountains and rivers to check the water regime, drew a water regime map of the Yellow River, went through all the hardships to find Dayu and gave him the water regime map. Dayu dredged the waterway according to the picture given to him by Hebo, and finally managed the Yellow River.