As China's corporate interests expand worldwide and face mounting security risks in unstable areas, Chinese employers and security companies are addressing their own weaknesses by building security teams abroad.

China Road and Bridge Corp, a leading construction contractor, is building a security system for its projects in East Africa. And there have been no major safety incidents since work began in December 2014 on its approximately 480-km-long Mombasa-Nairobi Standard Gauge Railway project.

Mo Kun, manager of the project's security department, said his was the first security department the company set up abroad. It hires armed police officers from the Kenyan government and security personnel from Chinese and local security companies.