Xiao Long is the cat Jem Carstairs had growing up.
Jem got Xiao Long when he was young. The cat lived with him and his family in the Shanghai Institute. When Jem moved to London after his parents' deaths, the cat stayed in Shanghai with his aunt Ke Yiwen.
- Xiao Long is literally translated to "small dragon" but was most probably named after a type of Chinese dumpling.
- It was because of Jem's fond memories of this cat that he later adopted Church.