The Old Summer Palace is currently investigating the cause of death of the black swan. Some witnesses said that the black Swan was named "Fangfang", which was given to it by volunteers.

The day before (April 4) was fine, the next day he died. Many people believe that tourist feeding may be an important cause of "Fangsfang's death" The exact circumstances of the death are unclear, and the investigation is still ongoing. It is said that some volunteers in the Old Summer. Palace regularly feed the black. swans.