The end goal, Crowdstrike claims, was to acquire the needed intellectual property to manufacture all of the C919's components inside China.
Crowdstrike claims that the Ministry of State Security (MSS) tasked the Jiangsu Bureau (MSS JSSD) to carry out these attacks.
The Jiangsu Bureau, in turn, tasked two lead officers to coordinate these efforts. One was in charge of the actual hacking team, while the second was tasked with recruiting insiders working at aviation and aerospace companies.
Fascinating reading. Here are two links. The first one is the executive summary over at ZDNet, the other is a PDF to the full report. Great for a lunch break.