Kapitan Cina
At year 1911, Tjong was appointed as Kapitan Cina (Majoor der Chineezen) to lead the Tionghoa community in Medan, replacing his brother, Tjong Yong Hian. Tjong was a highly respected person; he was also a master of the economics and politics of Medan. His business kingdom covered banks, railroads, plantations, which included palm oil plants and sugar plants.