A guided parafoil was the first proposed landing system for the Gemini capsule back in 1962, and was attempted with a suborbital rocket on the last Armadillo launch, but we've yet to see the first actual landing of a spacecraft or booster with a guided parafoil. As a booster gets larger the stresses of touchdown get more problematic, winds are hard to predict, and any lateral velocity at touchdown would be a real problem if the booster is landed vertically. But it seems like a viable strategy and it would be good to see how far China can pursue it. The combination of a parafoil and controllable thrusters (as opposed to the solid fuel rocket used on Soyuz/Shenzou) to cushion the landing and neutralize the last few meters per second of velocity might be more precise and less massive than airbages for a booster and would also be worth investigating.