Don't say Sang Yu is late, because it is still full of clouds. It comes from "Poem of Appreciating Lotte", which does not mean that the sunset at the end of mulberry and elm trees is near dusk, and its afterglow can still reflect the red sky;
The cold corner has gone, and the mulberry is not late. From preface to Wang Teng-ting, it means that although the morning has passed, it is not too late to cherish the night.