Hmm..."rush" indeed not a proper term here, think I should've use "accelerate" "focused effort" or something like that to better convey my point. It's about 16-17 years since 1999, and they made up almost 30 years of neglect in that time, but nonetheless there's still a couple of decades behind the curve to make up for. The biggest bottleneck China face is engine, specifically to produce comparable products to their Western counterparts in terms of fuel efficiency and thrust-to-weight ratio and service cycle.
Well there are certain aspects of industry which cannot be accelerated no matter how much money is put in and where time is needed.
Transfers of new technology, advances in civilian industries that are applicable to military industry, and advancements of traditional areas of strengths, as well as plain old teeth gritting R&D are all important for the advances in capabilities which we've seen.
But there are certain industries such as the development and production of advanced turbofans which simply have not progressed as fast as we'd like to see based on the original starting point and also based on lack of transfers of technology and advancements in civilian industry counterparts, so that's where time comes in.
Honestly, given where China was and how fast China's developed and based on the few indicators that we have of various new R&D directions, I think the Navy and overall military has done a marvelous job in enhancing its domestic R&D and applying that to new capabilities. I don't think any other military-industrial-complex of any nation on earth has developed as rapidly as the Chinese have in the last decade.