Ng Hung On became the manager of Ng Kwong Yip Tso in 1970. His predecessor was his great grandfather Ng Kam Tong. At the time, Kwong Yip Tso owned the ancestral house in the 5th Lane of Nga Tsin Wai. Before the Second World War, Kwong Yip Tso owned farmlands and houses in Mau Chin. As the eldest child of Kwong Yip Tso, Ng Kam Tong was eligible to inherit double share of the clan assets. He sold some of the farmlands to meet the expenditure of his grandson’s wedding. Unfortunately, the clan assets were commandeered by the Japanese armies, and a small compensation was received from the British government after the War. When the War was over, the house in Mau Chin was the only house Kwong Yip Tso owned. At first, it was used as a storehouse. In the 1950s, it was leased to an immigrant from Mainland China for a monthly rent of $10..Ng Hung On was Kwong Yip Tso’s manager and was solely responsible for rent collection.