I'd put my money on that it is a mix of poor education and years of being hardened by what the society throws at them. It's not that people don't get upset when they loose a relative or friend. But dying seems to be "a comon event" so no need to think too much about it. 

http://www.thecontroversialfiles.net/2013/05/chinas-top-9-fake-foods.html

It's great that when you have a guy come look at your A/C he doesn't waste too much time on safety equipment but just crawls onto the outside of the building 20 floors up. 

Probably those that you have encountered think that they are superheroes?

Because it's the only way that man can attract public attention to get his laboring payment. Your guys have acquired so much profits just because you are foreigners from  wealthy countries or finance industry or something like that. As a matter of fact, we are the 99% of the developing countries people. And you still laugh at us for our poor, hopeless way of living?

What kind of a sweeping statement is this?! Of course you can't just say an entire nation of people, over a billion in fact, don't have a perception of danger. Chinese people are humans just like everyone else in the world so of course most people here have a perception of danger and get scared when confronted with a situation or person who puts them in harm's way. What are you talking about? How about you save yourself a bit of time and energy and just stop writing utter rubbish?!

Ok, I change the question with: why A LOT of Chinese people do not have the ability to foresee a danger coming by using common sense?

you got your answer in your question

"common sense"

It is a mindset brought about by exploitation and the desire to get ahead by any means. Some people in China do some incredibly dangerous things because they are told to by their manipulative leaders and bosses. When the alternative is to lose what little income you have, people will put themselves in the most insidious situations. Mind, China is not alone in this type of exploitation. The UK during the industrial revolution was equally as bad. Many people died because they had no basic protection or workers' rights. The Chinese government is now forming something of a realization things must change. Laws are developing but, like anything, China is still considerably behind the west.

here you might find an answer http://www.wired.com/wiredscience/2010/12/fear-brain-amygdala/
otherwise feel free to check again philbravery's post" sex on a 30 days visa"...

Why should they? China is the safest country in the world. There is nothing dangerous in China.

There is the similar counter question. "why do the Chinese see danger where there is none?"

I can mention:
- people are affraid of my dog, it weighs 3.5 kg and is always on a leach
- the fear of Africans
- the fear of drinking cold water

The answer to that is provably easier, but it does counter the OP.

OK, sorry, maybe this is inappropriate but ...

I'm sick of the general "Why do Chinese people think like X?" questions. 

How the hell should I know? 

Ask the Chinese people you work with. 

Let me ask a question:

How are we foreigners supposed to know how or why Chinese people think the way they do?

Damn dude are you writing a book?

Maybe it's because some of them have been watching to many t.v. dramas...you know the one's the one's that show they have no fear and that they always win no matter what. 

It's not just the Chinese.  Yesterday, some laowai pedestrian thought he'd be cute and make a big, overly dramatic step out into traffic at a crosswalk (no traffic lights at this one) effectively playing chicken with oncoming traffic.  I'm sure he assumed I was just another Chinese driver tooting along in my BYD.  But I don't think he expected the little car to swerve and accelerate in his direction.  To his credit, he was pretty nimble jumping back up to the curb

The Chinese, in general, appear to me as the most frightened people I have ever met. 

Whenever I mention that I used to play football or any other mildly physical sports I regularly told 'too dangerous'. One person even informed me that tennis was a very frightening past time as the players twist ankles.

Chinese generally have very finely-tuned danger perception. It's just different from ours. Money might be the main reason here.

- If you play sports and hurt yourself, you have to pay a lot of money to the doctor.

- If you hurt yourself on accident, you have to pay a lot of money

- If you hurt someone else on accident, you have to pay compensation

- If you help someone who got in an accident, you have to pay compensation because nobody else will, so they have to blame the one who helped them.

etc.

The lack of education makes some dangerous things seem "normal."

After years of going through this bs, many Chinese simply give up and behave suicidally. It's sad.