Tip: Wang Xizhi, a great calligrapher in the Eastern Jin Dynasty, likes geese very much. According to legend, one day he saw a group of white geese raised by Taoist priests, liked them very much and wanted to buy them. Knowing that he was a famous Wang Xizhi, the Taoist priest asked him to write Huang Tingjing himself in exchange, and Wang Xizhi readily agreed. This riddle quotes the classic "Book for Goose", and the answer "Penguin" is interpreted as "Longing for White Goose".
Mystery: Wang Xizhi is willing to write Huang Tingjing (typing animal names)
Answer: Penguin