Bei Dong, second level engineer and Senior Engineer of CDI, he started working at the Technical Center of CDI in July 2011. He has long been engaged in the research and development of cement kiln co-disposal technology, ultra-low emission technology for cement production lines, and solid waste disposal technology. As the main responsible person and participant, he has won more than 10 various scientific and technological awards, published 9 academic papers, authorized 4 invention patents and 1 utility model patent.