Are the Northeast people descended from Mongols now?

Xianbei, Qidan, Jurchen, Mongolia, Manchuria and other ethnic groups in history do not belong to the northeast people now. Northeasters were formed during Zhang's rule in Northeast China. At the beginning of the 20th century, the national revolution storm, warlords scuffle, war disasters. Many people from Shandong, Hebei and Henan were forced to enter Kanto-the northeast is vast and fertile, but few people. At that time, Zhang ruled Northeast China, overhauled railways and built factories. And take the initiative to help farmers move to the northeast at a rate of 3 million people per year. At that time, the immigration rate in Japan was 300,000 per year. Zhang's actions fundamentally changed the population structure of Heilongjiang and Jilin, and prevented the northeast from being occupied by the Japanese army. It was a fatal blow to Japan's Manchuria strategy at that time. In this way, immigrants merged with the original locals and formed the "Northeast People".