SHANDONG QINGYUN CHANGXIN CHEMICAL SCIENCE-TECH CO.,LTD

Shandong Qingyun Changxin Chemical Science-Tech Co., Ltd, founded on June 6th, 2009, is a large chemical entity enterprise specially producing and operating N-methyl pyrrolidone (NMP) and γ-butyrolactone (GBL) series products.　As a high-tech enterprise with the most advanced technology, the best quality and the largest scale in China, the company h… More