The only reason this piece of turd took to the air at all was because they made extensive use of western technology. get a brain before u post this shit.
An airliner has too many parts and sub-systems, so for Chinese who wants to get their 1st airliner product up for sales fast - meeting the very hungry domestic demands ASAP, they can not await for so many new factories to start productions for so many never-before sub-systems and components, so instead of awaiting for EVERYTHING 100% to be ready domestically, they SHORT-CUT to Express Success by importing some of these, when their own versions are not ready, just market the main airliner product ASAP. These are not very high tech parts that need long research breakthrough whatsoever, but just things that they have not yet setup a factory to make yet, and will be faster to import to meet market demands ASAP.