It can be seen from the above table that in the first three quarters,except that the operating income of Yongdong Chemical kept positive growth,the operating income of the rest three listed companies had negative growth.rnAccording to the information of Blackcat,since the second quarter of this year,the carbon black and its downstream market became stable on the whole,the gross profit rate of carbon black products had a slight month-onmonth rise,however,affected by the factors such as high price of domestic coke carbon black raw oil,weak demand of automobile industry and continuous shock and decline in price of international crude oil,the operating rate of downstream tire market fell and the selling price of carbon black products fell,which resulted in sharp year-on-year fall of gross margin of carbon black products in the first three quarters.