Dongying Rich Chemical Co., Ltd. yog nyob rau sab qab teb ntawm tus Dej Yellow River hauv Shandong Qilu Pearl-Shandong Dawang kev lag luam kev loj hlob cheeb tsam, nrhiav tau nyob rau hauv 2006, nws yog ib tug yooj yim tshuaj raw khoom muag thiab export-oriented tuam txhab.