Yantai Wanhua announced on December 31, 2011 that on November 15, 2011, the company began routine maintenance, repairs, and technical transformation of the second MDI unit of its subsidiary Ningbo Wanhua Polyurethane Co., Ltd. As of December 31, the maintenance of the two sets of equipment in Ningbo has ended and normal production resumed. Precision Automobile Part,Automobile Parts Casting,Automobile Parts Electroplating,Precision Zinc Alloy Die Casting Dongguan Shangjie Precision Hardware Co., Ltd , https://www.sphzincalloy.com