Tian Tian (female giant panda) 2009. The male cub was named Shen Wei and the female Bo Si. After her arrival at Edinburgh Zoo she had an unsuccessful mating season in 2012. In April 2013 Royal Zoological Society of Scotland performed on her the first artificial insemination procedure on a giant panda in the UK. They later confirm that Tian Tian had become pregnant, but most likely reabsorbed the foetus late term. On 12 August 2014 Iain Valentine, Director of Giant Pandas for the Royal Zoological Society of Scotland, announced that a second implantation had taken place, she was pregnant and birth was expected around
Tian "Canopy-Heavens hypothesis" originated from the text Zhoubi Suanjing. The earth is covered by a material tian. "Huntian shuo" (渾天說) "Egg-like hypothesis". The earth surrounded by a tian sphere rotating over it. The celestial bodies are attached to the tian sphere. (See , Chinese creation myth.) "Xuanye shuo" (宣夜說) "Firmament hypothesis". The tian is an infinite space. The celestial bodies were light matters floating on it moved by "Qi". A summary by Ji Meng (郗萌) is in the astronomical chapters of the Book of Jin. Sometimes the sky is divided into "Jiutian" (九天) "the nine sky divisions", the middle sky and