The northeast is full of immigrants.

First, people in the Northeast are not all tall, such as Pan Changjiang, and not all strong, such as Gong Hanlin.

Second, not all people in Northeast China are Shandong immigrants. At least there are as many immigrants from Hebei as from Shandong, and there are also many immigrants from Inner Mongolia and North Korea.

Third, people in Northeast China are tall and strong on average. First, the descendants of immigrants have the advantage of genetic eugenics. Second, people in cold areas are generally tall and strong, such as Russians and northern Europeans. Third, the land in the Northeast Plain is fertile, and the variety of products is not rich, but the quantity is rich. People's recipes are relatively richer in calories and easier to grow. This is an incomparable advantage for people in the southern region with three mountains, six waters and one field.