Internet search giant Baidu could face stiff penalties and health-care-industry digital ads could be subject to tougher controls in the aftermath of a university student's death, according to analysts.

Shaanxi computer science student Wei Zexi, 21, suffered from a rare form of cancer and sought experimental medical treatment at a hospital in Beijing that topped a Baidu search result. He chronicled his ineffective treatment online, and his death last month prompted a public outcry.