Dong Long Co. is an equipment manufacturing base of COFCO Engineering & Technology (COFCOET). Dong Long Co.,is composed of Dong Long Saving Energy New Technology Co.,Ltd. Dong Long grain and oil Machinery Technology Co.,Ltd. and Dong Long Automate Technology Co.,Ltd. It has finished 150 technological innovations and invention creations since 1993.18 significant innovations,13 innovations of them has gained patent in china.3 items in them are inventions patents. Dong Long is a High-new technology enterprise, technology backing unit in trade department of civil, Dong Long technology is a fruit of Dong Long people praticing over the years.