Shan Shen was a planet inhabited by humans or a humanoid species with a Chinese culture. Some streets here were filled with flags, pagodas and various crowded stalls. Shan Shen's orbit neighboured several other celestial bodies, evidenced from the sight of nearby objects in from its upper atmosphere, one of which contained rings.
After the Trickster's attempt to change history backfired, all of the writing on the planet — including that on the Doctor's TARDIS — changed into the phrase "Bad Wolf". This, coupled with the ominous tolling of the Cloister Bell, warned the Doctor that the end of the universe was approaching. (TV: Turn Left)