51job, Inc. American Depositary Shares, also called 51job, is a holding company that engages in provision of human resource services. Read More It offers services in the areas of recruitment solutions, training & assessment, and human resources outsourcing, business process outsourcing, professional assessment, executive search and compensation analysis. The company was founded by Kathleen Chien, Rick Yan, Lei Feng, and Norman Lui in 1998 and is headquartered in Shanghai, China.