Me? 'low blood pressure and elephant's heart beat rate'. 

I was trained in Martial arts at my young age, what 'programmed' me I react only in defense, and never in an attack.

I also have visible facial 'scars' from constant laugh.

Maybe you arent getting enough exercise. For me, if I dont get some exercise regularly, my stress levels increase. Your description of how you behave is EXACTLY how I act when I dont get regular exercise. 

I speak out.  It seems to me it could be unhealthy to bottle it up,,, sooooo, I speak my mind.  Just this morning I told two middle-age male bozo's to use the sidewalk and not walk down the road. None of my business I know, but I get pissed-off about whatever so I say what's on my mind. I typically have been able to do so without losing my temper though. I've only used physical force twice in China in maybe more than six years, and even then it was pretty darn gentle compared to what I was feeling.   pretty darn good record for someone known for a hot-temper back home.

Small stuff?  Best square yourself up so it won't get to you.  

I am lucky since from Zhuhai there is an easy escape to Hong Kong or Macau. Jus an afternoon in Macau where people don't spit can help a lot. 

Just do what everyone else here does; come here, start a new thread, and BITCH about it.

Nobody really copes. We all become desensitized assholes ourselves over time.

During my stay, these little annoyances must have added up into the thousands by now. Even thinking of how to describe each little issue wastes more energy than the problem itself. I usually forgot all the annoyances within 2 days, but the stress they caused remains. Only way to avoid the stress is by not caring anymore. Desensitisation. The first step on the road to Chinese citizenship.

I go to the gym like silverbutton. I also use methods of intimidation rather than having to use physical force... and it usually works.

I try to watch out for patterns, so when I am having a bad mood I would end up in a bad situation. Like if I am feeling angry because of work, and someone invites me to eat somewhere at say 5:30pm. I will politely decline because I just know there will be some idiot in busy traffic that will piss me off or make me lose it.

Some moron will pull a u-turn on a narrow road with like 100 cars being blocked. Or things like trying to find a cab will be impossible and when you do find one, they will have passengers already and try to rip you off...

So instead, if I am feeling like I can't cope well with that today, I just make dinner at home and exercise. No use getting yourself into a situation that has a 95% chance of occurring because you are already angry or started your day off badly.

My wife is usaly the sorce of these anoyances
So i just tell her i still love her

For those suggesting going to the gym, I go usually 2-3 times a week, about 1,5 hours, a mix of strength and cardio.

Try out Ksepana Mudra (you'll find more info in Internet). I've found it today and decided to practice from now on. Seems adequate mudra for expats trying to survive in China.Good luck...

http://wellbeingmantras.com/ksepana-mudra-remove-negativity/

I had the same feelings when I was "fresh" in China, now I just tell myself... "this is China", take a photo and send it to my friends back home and have a laugh..

Don't let it get to you... the only one its affecting... is you.... so tell yourself "this is China" and have a laugh... you'll feel much better as time goes on....