Going East refers to the process of farmers from North China migrating to the northeast in China's modern history. The main reason for immigration was that the northeast was vast and sparsely populate

Going East refers to the process of farmers from North China migrating to the northeast in China's modern history. The main reason for immigration was that the northeast was vast and sparsely populated. A

Test analysis:

The Northeast Plain is the largest plain in China, with vast terrain, vast black soil area, vast land with few people and fertile soil, so many farmers in North China go to the Northeast to reclaim land for a living. After years of efforts by builders, the original "Great Northern Wilderness" has turned into a rich "Great Northern Warehouse", so this topic has been chosen as A.