Edinburgh many museums and libraries. These include the National Museum of Scotland, the National Library of Scotland, National War Museum, the Museum of Edinburgh, Surgeons' Hall Museum, the Writers' Museum, the Museum of Childhood and Our Dynamic Earth. The Museum on the Mound has exhibits on money and banking. Edinburgh Zoo, covering on Corstorphine Hill, is the second most popular paid tourist attraction in Scotland, and currently home to two giant pandas, Tian Tian and Yang Guang, on loan from the People's Republic of China. Edinburgh is also home to The Royal Yacht Britannia, decommissioned in 1997 and now a five-star
Tian the eight directions. The Tian are the heaven worlds and pure lands in Buddhist cosmology. Some devas are also called Tian. The number of vertical heaven layers in Taoism is different, the most common saying is the 36 Tian developed from Durenjing (度人經). In I-Kuan Tao, Tian are divided into 3 vertical worlds. "Li Tian" (理天) "heaven of truth", "Qi Tian" (氣天) "heaven of spirit" and "Xiang Tian" (象天) "heaven of matter". The semantics of "tian" developed diachronically. The "Hanyu dazidian", an historical dictionary of Chinese characters, lists 17 meanings of "tian" 天, translated below. The Chinese philosopher Feng Youlan