Dongying Rich Chemical Co., Ltd dị na mpaghara ndịda nke Osimiri Yellow na Shandong Qilu Pearl-Shandong Dawang mmepe akụ na ụba, nke hiwere na 2006, ọ bụ ahịa ngwaahịa ngwaahịa kemịkalụ na ụlọ ọrụ na-ebupụ mbupụ.