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human nature Plain book Zhang liang
04-13
Tao Te Ching Lao Tzu_Culture Plain book Confucius Confucianism
02-13
![The 6 essences of the legendary book "Su shu" penetrate human nature and point directly to people's hearts![fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)