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If you sit on the bank of a river for a long time, you can see the body of your enemy swim through it. ("The Art of War", China, IVv. B.C. is attributed to Sun Tzu.
YYY: In China, the climate is such that if you sit on the river for a long time, you will most likely get wet, freeze, get sick and can even give your own oak. Better not to sit.