In spring, willows sprout a few months later.

There is a proverb in northern China: 1929, don't shoot, walk on the ice in 3949, watch the willows by the river in 5969, the river won't open in 79, and the swallows won't come in 89. In other words, it will germinate when it is still cold in a warm, sunny and watery place. After three or nine days, it germinated in May and June. Others vary from place to place.

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