Giant Pandas can live to a good age. Shu Lan has spent much of her 23 years in Chengdu. She spent the period 1996-9 in Lanzhou, Gansu and she went back there a year ago. However the climate and zoo conditions at Lanzhou zoo have not suited an elderly panda and she is now going back to Sichuan. Although North-Western Sichuan is the main center for pandas in China they are also known in Henan, Southernmost Gansu and Shaanxi. They can tolerate cold conditions of high mountains and live on a diet of bamboo. It is suggested that the bamboo and housing provided for Shu Lan in Lanzhou was of poor quality.
In the early days of looking after pandas (1930s) they did not survive well in zoos, many that were sent to foreign zoos died soon after arrival. Even though the captive breeding programme for pandas is going well there are still only 1,864 living in the wild and 375 in zoos scattered around China and the world.