How many China top 500 enterprises are there in Zibo?

In 2008, there were three companies, namely Shandong Dongcheng Petrochemical Group Co., Ltd., with operating income of1109.79 million yuan; Operating income of Zibo Toyama Enterprise Group Co., Ltd.1030929,000 yuan; Zibo Mining Group Co., Ltd. 1009028 million yuan, respectively 4 12, 4.52 and 4.69.