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After Japan's defeat in World War II, how to deal with the 3 million immigrants left in Northeast China?

I'm from the northeast. I heard from the old man that (1) some returned home, (2) some were killed by China people, (3) some children were adopted by good people in China, (4) some women married China people as kannika nimtragol, and (5) some stayed in China as nannies. Get to the point, telling a story in Dan Tianfang, and the scene he saw when he was a child is described after the episode 10.