 To please the emperor, the official told him that the name of the structure was called the "unmoored boat", as the metaphor of the firmness of the Qing dynasty's regime.The 14.5-meter-long timber-mimic stony boat is one of the best-known structures in the garden.The Attic of Joy, alternatively called the Pavilion that Forgetting to Fly and the Waterside Pavilion, was rebuilt in 1870 on the eastern lakeside of the garden.