Nice use of the strawman fallacy. Yeah the poster mentioned engines, not comac itself so don’t put words in peoples mouths or try to change the subject to save your argument. China is in technological war with the US. In many strategic aspects, they should be secretive. some private companies can be more secretive than others, so again back to the original argument, what’s your point?
Chinese high tech industry is operating on a market economy base,not some Soviet style planned economy. In a market economy,companies need to advertise their products and technology in order to attract customers and investors,that's how market works.