Geographical question: Where does Kanto refer to? What does it mean to go to Kanto?

Kanto. This refers to Liaoning, Jilin and Heilongjiang provinces in the northeast of China. Because the three northeastern provinces are located in the east of Shanhaiguan, it is called. What is the explanation of "going to the East"? "Going to the Kanto, the Western Regions and South Asia" can be called three great human migrations in China's modern history, in which "going to the Kanto" took the longest time and experienced the largest number of people. From the early Qing Dynasty to the founding of New China, a large number of poor people in North China were forced to make a living, and more than 30 million people set foot on the land of Kanto. This rare migration phenomenon in history is called "Crossing the Kanto", which is the largest migration activity in the migration history of China and even the world.