Why did Wang Xizhi write this son's name when he was studying calligraphy?

Mrs Wei is Wang Xizhi's first calligraphy teacher! Wang Xizhi's diligence and talent in calligraphy make his works better and better, so Mrs. Wei should say, "The name of this son (in the future) will definitely replace me!"

In fact, Wang Xizhi's handwriting is good, and Mrs. Wei is very happy, saying that this child will definitely become a big document in the future, and his reputation in calligraphy will definitely surpass himself!

It shows from the side that Wang Xizhi's handwriting is good, and even his own teacher sighs.