There are two genera of olive in a city of Guangzhou named Zengcheng. White olive and black olive are two special local fruits in Guangzhou. The city Zengcheng is not only famous for olives but also well known for litchi. White olive can be processed into all kinds of fruit snacks. Black olive is one of the four treasures in Zengcheng City. There other three are Gualu Litchi, Simiao Mi and Liangfen Cao. The black olive is useful from head to foot. Its flesh can be prickled as a savoury dish and also can press oil. Olive kernel can made into dishes and is a wonderful ingredient for snacks. Olive core as a famous material for arts has a history of more than 300 years.