All of the above are Qianlong's seals. The first seal: "The Treasure of the Supreme Emperor" is pronounced as: "The Treasure of the Supreme Emperor" was made in the 60th year of Qianlong's reign (1795). ). On September 3 of that year, Emperor Qianlong promulgated the secret edict of establishing the crown prince written in the thirty-eighth year (1773), and established the emperor's fifteenth son Yong Yan as the crown prince. The following year, Xinzheng held a Zen ceremony Ceremony. After Emperor Qianlong returned to power, he still lived in the Yangxin Hall to train the government, while Emperor Jiaqing could only live in Yuqing Palace where the prince lived. The successor emperor's reign name was Jiaqing, which was only used externally. The Qianlong reign name continued to be used in the palace. Important government powers such as approving memorials and appointing and removing officials were still in the hands of Emperor Qianlong. This "Treasure of the Supreme Emperor" is the largest among the imperial seals of the Qing Dynasty, embodying the supreme power of the Supreme Emperor. The second one: "古西(rare) emperor" pronunciation: Tianxi 古子 "古西天子" seal. This was the imperial treasure that Emperor Qianlong was most proud of in his later years. There is more than one seal of "Gu Xi Emperor", "Qianlong Baosou" records seventeen seals. There are two similar seals: "Gu Xi Emperor Bao", "Wufu Wudai Tang Gu Xi Emperor Bao", and the third one: "Qianlong" "Chen Han" pronunciation: Chen Qian Hanlong "Qianlong Chen Han" is a seal commonly used by Emperor Qianlong of the Qing Dynasty to cover his imperial calligraphy and paintings. Changshi stone, the texture is extremely warm and moist. The Yangwen seal script "Chen Han" means the emperor's calligraphy.