What is the reason why northerners moved south in the 4th century? Urgent! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

After the An Shi Rebellion broke out in the 14th year of Tang Tianbao, a large number of northern people moved south to escape the war.

Since then, due to the war caused by the separatist regime of the buffer region, the peasant war and the warlord scuffle at the end of the Tang Dynasty, and the evasion of heavy taxes, the northern people's southward migration has been carried out intermittently until the end of the Five Dynasties and Ten Kingdoms, forming the second wave of the northern people's southward migration in the history of China, with immigrants all over the south.

Among them, Zhejiang, Shanghai and Jiangsu and Anhui provinces have absorbed the largest number of immigrants, which is one of the main immigrant areas, and immigrants have played an important role in promoting the economic and cultural development of Jiangnan area.

After the An Shi Rebellion broke out, the north fell into war.

The Anshi Rebellion was stubbornly resisted by Tang Jun in Nanyang and Suiyang, and its activities in the south of Huaihe River were quite limited, not to mention entering the south of Yangtze River.

Except for the short-term local wars caused by the two uprisings, Jiangnan generally maintained a peaceful situation.

In addition, Jiangnan has been one of the most developed areas in China since the Eastern Jin and Southern Dynasties, with a good economic foundation.

Based on these two reasons, after the Anshi Rebellion, Xuanzong led some officials to flee to Shu, while most of the literati went to the southeast.