Yes you can - at least my experience of seeing some Chinese guards (e.g. outside an embassy) is that they don't blink.
This article claims 1 hour shifts of not blinking for a guard: https://www.recruiter.com/i/blinking-on-the-job-not-allowed-...
This article claims 1 hour shifts of not blinking for a guard: https://www.recruiter.com/i/blinking-on-the-job-not-allowed-...
You're not going to shut down someone's corneal reflex obviously: http://en.wikipedia.org/wiki/Corneal_reflex but that requires poking a guard in the eye or shining a bright light at them.