To quote a poem, do you put the period inside or outside the quotation marks?

Look at your whole article. First, express the words directly quoted in writing. For example, in order to remind himself often, Lu Xun wrote a line on the bookmark: "The heart is important, the mouth is important, the eyes are important, and reading is important." (Obviously, this is a direct quotation in writing. Therefore, it is worth noting that after the quotation ends, the period should be in double quotation marks. ) 2 "Total loss." It has been circulating for at least 2000 years. (Obviously, this is also a direct quotation, but both "be swayed by considerations of gain and loss" and "this maxim" have become appositive compound references, and * * * have become the subject of "cycle", so there is no need to add other punctuation after the content in double quotation marks ends. ) On the way down the mountain, I don't know who sang "Gao Shanqing". The author only quoted a lyric of Gao Shanqing as the content of his writing, so he added a comma to the quotation marks of the quoted words, which forms a complete statement with other words. The horse written by modern painter Xu Beihong, as some critics have said, is "full of vitality" (obviously, this sentence has the same effect as the above-mentioned example, but the position of the quoted content is the former.