Why did Mrs Wei cry when she saw Wang Xizhi's calligraphy?

Mrs. Wei was Wang Xizhi's first teacher of calligraphy. Wang Xizhi's diligence and talent in calligraphy made his works better and better, so Mrs. Wei said, "This son will take my name." 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 so good that even his own teachers are amazed.