100 Days of visa checks

100 days of visa checks foreigners started Middle of May.  It is pretty easy - they just stop everyone that does not look Chinese....and I do not look Chinese.  I have been stopped once already and they asked to see my passport and residency card....both which were at the Public Security Bureau at the time.  They asked me a bunch of questions, tested to see if I knew any Chinese (I am here on a student visa),  checked me on the computer - then let me go.....it still makes me nervous.