Fairy tales ?
Really ?
Of course, there are hundred of flights... And I took some, and I had many questions departing from China: like why are you going there and bla bla bla... My bag was crutinized, every paper I was carrying in my backpack and these were work realted ones...
My comment was general, so if you are not satisfied with, you could make a nicer comment. I live here in China for such long time that I know how it works (China side): there are rules (hundreds) and unwritten rules (thousands) and one day you end up with a stubborn security officer who will bother you.
You don't believe it ?
A friend of mine was flying to Hangzhou, coming back home. He was carrying his drone and guess what ? He was denied the flight because you know G20 security measures ! (
2016 G20 Hangzhou summit - Wikipedia)
So what ? Fairy tales?
If in your case, you were lucky, it is not a reason nor nice to talk about fairy tales. Like it or not, there is a sensitive case going on between China and Taiwan. You were lucky, fine. But I suspect that the OP came during the big congress where other rules were in place. Or might be that a specific rule was issued for flights inbound from Taiwan... Who knows ? China is like I said: tons of rules changing so quickly that sometimes officers are unable to tell which one is in place.
You want another example ? I was flying in downtown Guangzhou. No NFZ, no TFR, nothing!!! And it was a long time ago (!) where there were absolutely no rule about drones in China (beginning of 2016). And then 2 officers came and asked me to stop. I landed and I asked them why ? I spent half an hour asking the same questions again and again. I had first 2 young officers, then the big chief who came with a "translator" and they were unable to cite me the exact rule...
I decided to let it go because you know, I am a foreigner.
Same situation one week later, same place... But I was with a friend of mine, a Chinese guy. Same 2 officers came, my friend shouted at them, telling them that if they don't know the rules, they don't have the right to do anything... and I was able to continue flying without any issue... Why ? Who knows/cares? This is China