Yonfan is a Hong Kong film director and photographer. He was born in Wuhan, Hubei, Republic of China. As the Yang family emigrated from mainland China, they lived first in Hong Kong for 3 years, and then moved to Taiwan when Yonfan was 5 years old.

He spent most of his childhood and adolescence in Taichung, Taiwan, and returned to Hong Kong in 1964 as a 17-year-old man to work as a photographer, but left for the United States in 1968 to study film. After a couple of years travelling through the United States, France and Britain, he returned to Hong Kong in 1973, and became a photographer noted for his celebrity portraits.