first step always tough. build infrastructure , ecosystem and stable the supply chain.Wow, they actually delivered it just a little over two months from its certification date. For the ARJ21, it took nearly 11 months from certification (Dec. 2014) to delivery (Nov. 2015). Pretty cool. The ARJ21 took another 7 months from delivery until it was able to go into service, so we'll see if the C919 can beat that.