WuXi AppTec Co Ltd is a China-based company principally engaged in the business of new drug research and development and manufacturing services. The Company conducts its business through six segments. The WuXi Chemistry Segment is primarily engaged in providing new drug research, development and manufacturing services. The WuXi Testing Segment is primarily engaged in providing pharmaceuticals, medical devices, and in vitro diagnostic reagents services. The WuXi Biology Segment is primarily engaged in providing drug discovery and research services. The WuXi ATU Segment is primarily engaged in providing customers with integrated medical product process development, manufacturing and testing services. The WuXi DDSU Segment is primarily engaged in providing customers with integrated new drug research and development services. The Other Segment is primarily engaged in administrative services, sales of raw materials and sales of waste materials.