位於上葵涌昌榮路的同珍醬油罐頭有限公司，是全港規模最大的醬油及罐頭食品製造廠之一。Tung Chun Soy Sauce & Canned Food Company, at Cheung Wing Road in Sheung Kwai Chung, is one of the largest among the hundred factories in the soy and canned food industry.