It refers to all directions and regions. The sixth and third chapters of the Water Margin: "There are more than a thousand military horses, all of which are seven long and eight short, with four mountains and five mountains." The fiftieth time in A Dream of Red Mansions: "He has seen a lot of the world since he was a child and traveled all over Qian Shan with his father."
Word decomposition
The interpretation of four is four names, three plus one (the word "four" is often capitalized on banknotes and documents): four sides. All around. Four orders (namely "four seasons"). Four bodies (a. refers to human limbs; B. It refers to four fonts: Kai, Cao, Li and Zhuan. Si ku (four ancient books: synonymous with classics, history, books and collections). Also known as "four"). Four Gentlemen and Five Mountains explain that the five famous mountains in China refer to Mount Tai in Dongyue, Mount Huashan in Xiyue, Mount Hengshan in Nanyue, Mount Hengshan in Beiyue and Mount Songshan in Zhongyue. Also known as "Five Mountains". The floorboard of the five famous mountains in China. The accounts in ancient books are slightly different. Mount Taishan in Dongyue, Hengshan in Nanyue, Huashan in Xiyue, Hengshan in Beiyue and Hengshan in Zhongyue.