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Poseidon Club of Harvard University is the oldest and most famous secret student club in America. Established in 1794. It only recruits 10 new members every year, and the annual membership fee paid by members is staggering. Members of the club are selected strictly according to their family background, and all members are male, and they are lifelong. Every autumn, the club will select "noble blood" from the second-year students and invite them to participate in organizational activities. Harvard University in the United States can be as famous as Oxford University in the United Kingdom, which is not unrelated to its famous Bosslim Club. In the Roosevelt family, except franklin roosevelt, theodore roosevelt and other family members have participated in the Bossian Club. When theodore roosevelt married his daughter to White House spokesman Nicholas Longworth, he specially emphasized: "Nicholas and I are both members of Bosslim Club." President franklin roosevelt once said, "The biggest regret in my life is that I was not chosen to join the Persian Club".