Don’t bring your personal devices to China. The Olympic committees of several European countries are issuing burner devices to their athletes and strongly discouraging them from bringing their personal devices to next month’s Winter Olympics in Beijing. That has long been an established practice for some Western companies sending employees to China.
If you attend the annual Black Hat hacker conference in Las Vegas in person, you probably also shouldn’t take your personal device.
Since personal devices are often the second part of the two-factor authentication required to access your network, you need to establish rules about where those devices can or cannot go. Or better still, get hardware tokens and don’t trust smartphones at all.