Introduction to calligraphy: The character "福" is a birthday gift given to the teacher by Tang Yin. In the fifth year of Emperor Zhengde's reign in the Ming Dynasty, at his teacher's birthday party, Tang Bohu was ridiculed for being empty-handed, so he wrote "a blessing with a dragon head and a phoenix tail", which means that if you have clothes and fields, your son will become a dragon and your daughter will become a phoenix, and the blessings will be boundless.