In 2005, China exceeded Japan for the first time and became the world s second largest ethylene producer. By the end of 2009, ethylene production capacity in China had reached 13.9 million tons and would increase by 8.7 million tons before 2015, 42% of which would put into operation in next two years. As yet, China s annual ethylene production capacity was 2.5 million tons less than the world s largest ethylene producer U.S., but gap of production capacity between the two countries were bridging up. From 2010 to 2015, 54% of Asian newly-built capacity would be set up in China. In 2015, production capacity of ethylene in China would surpass the total capacity in Japan, South Korea and Taiwan area.