How to understand the word Wei Zi?

(1). That is Ziwei Garden. Star official name, one of the three walls. The Book of Jin Tian Wen Shang Zhi: "The Purple Palace Wall is fifteen stars, with seven stars in the west and eight stars in the east, north of the Big Dipper. On purple, the throne of the great emperor is also, and the son of heaven is constant. " Tang Du Fu's Thirty Rhymes to Xue Mingfu in Autumn: "Purple is in the six corners, and the emperor rides on it." "Cloud Seven Signs" Volume III: "Zijin Que, Seven Trees." Qing Li-E's Miscellaneous Notes on the Life of Dongcheng Irrigation Garden: "Like the Tianhe River, cutting ponds and building pavilions." See Ziwei Yuan.

(2) refers to the palace. Selected works of Wang Yanshou: "It is the secret temple of light, supplemented by purple." Zhang Zai's note: "Wei Zi, the Supreme Palace, refuses to be the capital." One of Tang Li Bai's Poems of Music in the Palace: "The little room is full of gold, and Yingying is in Wei Zi." Chen Ming Ruyuan's "Raiders of Jin Ping Mei Story Shooting": "Heming Shuangfeng is happy to come to the instrument, and the flowers are fragrant in three halls."

(3). Also called "Wei Zi". In the first year of Kaiyuan in the Tang Dynasty, Zhongshu Province was changed to Wei Zi Province, and Zhongshu Scheeren was Wei Zi Scheeren. In the Tang Dynasty, Li Jiayou and He Zhang wrote a letter to Sheren: "Han keeps talents, and the spring city is purple." Song and Huang Tingjian's "The Second Rhyme of Flowers in the Birthplace of Kai Xin's Tour": "Leisure is full of fun." Xie Ming Zhao Zhe's "Five Miscellaneous Matters Part I": "Wei Zi was originally an emperor star. According to his political affairs, Zhongshu Province is also called Wei Zi, and the others are Ziweilang." "Lessons from the Past" Qian Sheren wrote a poem on the swallow upstairs and said, "At that time, there was a China calligrapher, Qian Yi, with the word." ... he has lived in Wei Zi for a long time and wants to work outside the calendar. "