Gongniu Group, also known as Bull Group, is a Chinese civil electrical products manufacturing company co-founded by Ruan Liping and Ruan Xueping in 1995. Headquartered in Cixi, Zhejiang, Gongniu Group's shares began to be publicly traded on the Shanghai Stock Exchange in February 2020. Gongniu Group had long been regarded as a family-owned and managed company before it went public. Prior to 2017, the Ruan brothers held 100% of the company's equity as its sole shareholder. Wikipedia