In 1991, Hop Seng Corporation fully entered the era of specialized and large-scale production.

In 1991 , Horisun began to expand beyond China, conducting technical exchanges with Japan, Taiwan and other places, introducing high-tech forging equipment from developed countries, changing the traditional sand casting to mechanical hot forging, and producing burners using forging technology. The fire distributors produced using new technologies filled a gap in the domestic market, and Horisun entered a new era of professional and large-scale production.