Y-8F and Y-9 are such an important platform that they bear so many different variant of special purpose mission plane for the PLAAF and PLANAF from surveillance to maritime patrol.
Cannot imagine what will happened to China air force modernisation now if without this platform. Good range, good endurance, loiter time , great payload and spaces enough for plenty of equipment onboard. Only draw back will be a slower speed compare to jet airliner.
Hope C919 will takeover this baton soon.