Why is Gong Xue called Wei Zi Scheeren in A Dream of Red Mansions?

Wei Zi Scheeren was also the official name of the Tang Dynasty. In the article Yuan Wailang, six departments in three provinces of Sui and Tang Dynasties were introduced, and Wei Zi Scheeren was one of them. One of the three provinces is called Zhongshu, which was renamed Wei Zi Province at the beginning of the new century, so a series of official names in the province were changed to Wei Zi, and Zhongshu was renamed Wei Zi Sheren, so this Wei Zi Sheren is the same.

Who is Mr. Wei Zi Scheler in the Red Chamber? Well, exactly, there is no such official name in the article, but it appears in the JOE version of Fat Batch:

For the fourth time, the unlucky woman was partial to Lang Hulu's misfortune.

..... In good years and heavy snow, pearls are as gold as iron. Jia Xu's side approval: After Wei Zi gave up Gong Xue, he is now in charge of the internal warehouse, which is divided into eight rooms. ……

The difference between Wei Zi and Wei Zi is "sting", but the meaning is much worse. Wei Zi was born arrogant, while Wei Zi was much more elegant and generous. It may be better to use it on the heads of literati. However, it is not clear why typesetting is always called "Wei Zi Scheeren" (after all, it is purple armor)