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In 2009, at an antique treasure hunt in Jiangxi, the collector paid a 200 yuan appraisal fee, Liu Yan used such means to deliberately identify it as a replica of the Republic of China, asked others to spend 170,000 yuan, cheated the Qianlong authenticity into his own hands, and then turned around and sold it for a high price of 87 million yuan at the Beijing Poly Auction Company.

In 2021, Cui Kai copied Liu Yan's approach, also in the case of people paying 200 yuan appraisal fee, "deliberately" said that it was "Minmin kiln imitation", and then bought it himself, but he himself touted this porcelain as "the authentic kiln of The Guangxu Official Kiln of the Qing Dynasty" at the auction.
Generally speaking, the least moral thing for making an appraisal is to accept money and tell the truth, but neither of them has it, and there is no shame for their own selfish interests.
In particular, Cui Kai, even openly using media platforms such as Kuaishou and Douyin, hype, belittled folk collections, and gambled for 300 million yuan, which is completely a hooligan behavior, hiring extras to play collectors, scolding Ye Peilan, Li Zhiyan, Feng Xiaoqi, Li Jianchen, Ma Weidu, Lu Chenglong and other behaviors, further deepening the chaos in the antique industry.
What should an expert do? Be knowledgeable, humble and cautious, not blindly arrogant.
Liu Yan was still self-aware and ran back to Hong Kong.
Advise Cui Kai, you still go back to Chengdu, Sichuan, and continue to open your antique shop.