Who wrote the calligraphy of the heirloom Fu Zi?

The blessings written by calligraphers who can stay in the history books can be used as family heirlooms. Only when the master wrote the word "Fu" was handed down from generation to generation. His blessing was engraved on Mount Tai, Mount Huangshan, Mount Wutai and the Great Wall. No matter how many years later, our descendants will know him. His blessing has been passed down from generation to generation, and it is really precious to get the blessing of Master Guan Tong.