Asia's largest naphtha processing plant will have ethylene production capacity of 1.2 million metric tons.
The new plant, expected to start between April and June, will enhance production capacity to 4 million tons a year, a surge of 42 percent.
Company currently operates two crackers having combined capacity of 1.73 million tons.
Due to increasing demand for ethylene in China, major petrochemical manufacturers are extending their ethylene capacity.
In December, South Korea's leading ethylene manufacturer, Yeochun NCC restarted a cracker, which increased ethylene capacity to 857,000 metric tons a year, a hike of 68 percent.