Which famous calligrapher wrote the word "Fu" on the Badaling Great Wall?

The word "Fu" in the photo is called "the first blessing of the Great Wall in Wan Li", and the author is Guan Tong.

Guan Tong (alias: Aisin Choro Qilu), a contemporary scholar of longevity culture, studied under Lou Yulie, a master of Chinese studies. Under the guidance of Aisin Choro Hengde, a descendant of the Qing royal family, he was awarded as the eleventh generation inheritor of Aisin Choro's royal blessing culture, which inherited the royal blessing culture from Kangxi Imperial Pen.

I hope I can help you.

Note: Tong Guan's information comes from the Internet.