Lake Mattamuskeet National Wildlife Refuge
Biography: Liyun Yu is professional photographer living in North Carolina. He is a PPA Certified Professional Photographer, and has the professional degree of PPA Master Photographer. His photography has received recognition in the International Color Awards and the Black and White Spider Awards. He was certified by Olympic World Cup Competition Committee as the World Top Ten Photographer in 2017. He is the winner of PPA Grand Imaging Awards.