Let’s see... the perp has straight black hair, Chinese eyes, is a little over 5 feet tall... that narrows down our search to... most of the population of China.
But seriously, how does facial recognition work in a country where so many people have such homogeneous features? I saw a picture of about a dozen high school aged kids (seemingly Chinese, but they could have been from a different Asian country) and they all looked remarkably similar to each other.
Think a few thousand false positives will stop the ChiComs?
More depth and breadth of databases to cross reference, alongside more restricted movement of individuals. Such a system makes it easier to catch locals while being able to spot and question outliers.