A leaf knows the autumn of the world. What does a leaf mean? Answer the source.

Joan Lin, a young scholar: The solstice in winter sometimes becomes gloomy, while the leaves of tung trees fall in early autumn.

Scar ash is the ash burned by reed film. It is said that in the winter, the ashes on the ground are "lifted" and flying all over the sky.

Platanus acerifolia leaves, the first Platanus acerifolia leaves will fall in early autumn.