Kites flutter in the air, inseparable from the constraints of ropes; trains have the speed of the wind, inseparable from the constraints of steel rails; airplanes flying in the blue sky, inseparable from the constraints of the route; intersections...
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![I empathize with don't fall in love, am I wrong? Theoretically, there are moral constraints[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)
No man's land human nature restraint
10-26
