 Shangqing Daoism also developed meditation practices that take adepts to the extremities of the cosmos or to the Sun, the Moon, and other astral bodies (Robinet 1993: 171–85 and 187–230). For some of their features, these practices are related to the “far roaming” described in pre-Han and Han literary works (see  §2.2).  The Dipper, in particular, is the heavenly residence of the Great One (Taiyi); it is made of nine stars, two of which are said to be visible only by advanced adepts. One of the nine stars, called Heavenly Pass (tianguan), allows the adept to exit the cosmos and access the domains placed above and beyond it. The meditative walk on the stars was called Pacing the Celestial Net (bugang). It incorporated the ancient ritual practice of the Steps of Yu (yubu), which imitated the lamely way of walking of the mythical Emperor Yu, but also included cosmological and numerological elements (Andersen 1989–90).