The earth is not flat for three miles and the sky is not clear for three days. Where does it come from?

"The sky is never clear for three days, and the earth is never three miles flat." This comes from Zhu Guozhen's "Yongtong Essays" No. 15 of the Ming Dynasty: "The rain in central Guizhou is because the earth is among thousands of mountains, and the mountains and rivers are covered with clouds. There are few sunny days." The saying goes: "The sky is never clear for three days, and the ground is never three miles flat." This means that the weather in central Guizhou is prone to change and rain, and the mountain roads are rugged.

"The sky is not clear for three days, and the land is not level for three miles." is a proverb that describes the difficulty in growing crops due to poor weather conditions and poor geographical conditions. It mostly means that the weather in central Guizhou is prone to change and rain, and the mountain roads are rugged.

Meaning:

The weather is clear in March, which means that the climate in Guizhou is changeable, with many cloudy and rainy days, humidity, and few sunny days. The fact that the land is not three feet flat means that the terrain of Guizhou is uneven and uneven, with many peaks.

Guizhou’s climate is warm and humid, belonging to a subtropical humid monsoon climate. The temperature changes little, with warm winters and cool summers, and a pleasant climate. Across the province, the average temperature in the coldest month (January) is usually 3°C to 6°C, which is higher than other areas at the same latitude; the average temperature in the hottest month (July) is generally 22°C to 25°C, which is a typical summer Cool areas. There is more precipitation, obvious rainy season, more cloudy days and less sunshine.

The ground on the Guizhou Plateau is rugged, and the air is lifted, stirred, blocked, and rubbed. There are many opportunities for warm and cold air to come into contact. This is the main reason why Guizhou has many cloudy and rainy days, and also creates Guizhou’s warm winters and cool summers. , and at the same time there are many negative oxygen ions, so "the sky will never be sunny for three days."