When did China's farming civilization come into being and how did it spread?

Agricultural civilization came into being in China about100000 years ago. Planting edible plants first, and then planting crops with high yield through selection.

Before Wei, Jin, Southern and Northern Dynasties, it was mainly "rice in the north and rice in the south". After Sui and Tang Dynasties, wheat was popularized and gradually formed the pattern of "planting rice in the north and planting it in the south".

Various crops have cultivated and introduced some new crop varieties in the process of planting. In particular, corn, potato and "Zhancheng Rice" introduced from Han and Song Dynasties became the main crops in China.