Tjong Yong Hian (1850-1911) was a Hakka Chinese businessman and kapitan who greatly contributed to the development of society in the city of Medan around the early 1900s. He is the brother of Tjong A Fie, his kapitan successor.

Tjong Yong Hian, also known as Zhang Yu Nan or Zhang Rongxuan, was the second of 7 children. Descending from a Hakka family, he was born in Guangdong, Songkou city, Meixian District,