An aeroplane

Amidst the people who know, to build a commercial aeroplane is an incredible feat of engineering because in the list of complexities is the lay out of the lines for hydraulics, electricity, fuel, water, waste, etc.
For this a new plane has to have an international license.
So, China has decided to enter the business of producing commercial aeroplanes. This  is her first one:

http://en.people.cn/n3/2017/0506/c90000-9211745.html

Now, for her, the real headaches begin. She has to see that her plane will pass the oversight metrics that will be put on this plane by the International Authorizing body.

If she get its, her domestic airline companies will of course do their duty and they will buy it.

The test comes when international airlines decide if is worth their dollars to get it.

Then you can sense the annoyance of Boeing and BAE.