(1) If the quotation marks are independent and complete, enclose the period in quotation marks.

Exodus: I think of a poem by Jia Dao in the Tang Dynasty: "But how can I know which corner facing the mountain is so cloudy?" ."

(2) The quotation is incomplete or the quotation is part of one's own words. At this point, the period is placed outside the back quotation marks.

For example, when writing an article, we should "see the strangeness in plain words, the danger in common words, the novelty in old words and the color in plain words".

(3) There are question marks and exclamation marks at the end of quotation marks, and both direct speech and enclosed speech are placed in quotation marks.

Our slogan is "Long live the great unity of the people of China!"

He looked at her face with tears and said, "Are you crying?"