Boeing and Air Bus

The above 2 companies dominate the business of producing passenger air planes in the world.
However, a new competitor as appeared:

http://www.xinhuanet.com/english/2018-12/28/c_137704830.htm

How good will it be?

All I can say is this: It is about business and profit. And if its product is poor, that will be the death knell of China's dream to have toe hold in the commercial airline industry.