(literary) the sky; the heavens; also referred to as 太虚 tài​xū

(literary) natural law or the fundamental principles of the universe

one of the Three Pure Ones (Sanqing) in Daoism, the realm inhabited by the Grand Supreme Elderly Lord (Daode Tianzun); more generally, the realm of immortals

the era name of Emperor Wu of the Liang Dynasty during the Southern Dynasties (547-549 CE)