Food Policy & Law Court pulls plug on California soy business and its tofu, sauce Wa Heng Dou-Fu & Soy Sauce Corp., doing business as Wa Heng Dou-Fu & Soy Sauce International Enterprises (Wa Heng), along with co-owners Peng Xiang “Martin” Lin and Yuexiao “Opal” By Dan Flynn / 28 Jun 2016