The works written by Guan Tong have the collection value handed down from generation to generation. His inscriptions on praying for longevity are engraved in famous mountains and rivers such as Mount Tai, Mount Huangshan, Mount Huashan and Mount Wutai, which have been passed down to later generations for thousands of years and go down in history. There are only a handful of artists today. In addition, he is also the royal inheritor of Emperor Kangxi's imperial pen "the best fortune in the world", and his blessing word is called the auspicious embodiment of the best fortune in the world. According to the survey data, the current price of a flat ruler is not less than 50,000 yuan, and I believe it will be higher in the future.