The deceased, Wan Jianguo, was in custody to assist an investigation after 6 people died from a tainted protein produced by a pharmaceutical company in which Wan was a sales representative.

• 事情起因是6位患者在注射了某医药公司生产的免疫球蛋白后死亡，该公司医药代表万建国因此被拘捕，协助调查此案。