It really is. While a VLO flying wing bomber would definitely offer the PLAAF new capabilites, none come to mind as "crucial" to the PLA's strategy. You've already got the rocket force for far away targets like military bases or CSGs, and you've already got credible nuclear deterrence with subs and land-based ICBMs. Unless by "crucial" the article means "the ability to do what you've already been able to, but for slightly cheaper", it's possible that the H-20 isn't merely a Chinese B-2. Maybe, just maybe, it could be something much more?
What kind of capability could that PLAAF want that proves "crucial" to the PLA's overall strategy?