1 which of the royal gardens first provided the function of seeking immortality?

Penglai Mountain Garden. Penglai Mountain, also known as Jiuxian Mountain, is located in Banmian Town, Youxi County. As early as the Qin Dynasty, this island mountain was named Penglai Mountain to simulate the realm of immortals. Compared with the practice of Yan Zhaowang in the Warring States Period, it was endowed with a layer of image. Since then, it has become the first garden in the royal garden with the function of seeking immortals, which opened the precedent of seeking immortals in the Western Han Dynasty Palace.