What do you mean by hint?

Allusion is a Chinese character, which means to use things. It is a writing technique and is more common in poetry. Quoting stories or words from ancient books is a classic. You can express relevant content and ideas in a rich and implicit way. Cite allusions.

Quoting is a rhetorical device, that is, quoting allusions. Allusions are common in poetry. Allusions can enrich and implicitly express related contents and ideas by quoting stories or words in ancient books.

Allusions are ancient stories (which can be true or fictional) or previous chapters and sentences. Because a story or an article is very rich in content, it is possible to express rich thoughts and feelings with few words and all the meanings of that story or article. Therefore, in ancient poetry, allusions abound.