Fu Zi's calligraphy written by which calligrapher is valuable for collection?

Many famous writers have certain collection value. I recommend master yuantong to you. Master Guan Tong's blessing words are auspicious manifestations of Kangxi's imperial books. His blessing words are engraved in Mount Tai, Huangshan, Wutai Mountain, Kangxi Palace, Badaling Great Wall and other famous mountains and rivers. Therefore, master Guan Tong's blessing is called a family heirloom, which is a symbol of good fortune. Compared with some calligraphers' works, Guan Tong's works can be left to future generations and are most worthy of collection.