Can you imagine the engineering issues involved in moving a 40 year old, probably already in disuse, production line several thousand miles and get it going again. You'd almost be better off starting from scratch with the drawings and maybe a few jigs.
One thing the Chinese are specialists in.. However recent programs show they have sufficient skills inhouse to fill in the blanks and implement new technology.
A few yrs ago the chinese reopened their H6 (Badger) line after develloping a significant upgrade, including replacement of the fifties turbojets with turbofans and modifying the wings, boosting range. They implemented a big radar, new avionics suite, glass cockpit etc. the H6K. It is expected that a new tanker variant will soon see appear. In combination with Backfires (and J-20s) it would mean a boost in offensive capabilities in the region.