Significant dimensions are length,165 meters (540 feet), Beam, 20.6 meters (67.6 feet). Speed is over 25 knots. A range of 10,000 nautical miles and endurance of 90 days, suggest these may not be built just to hang around China’s coast. 10,000 or 10,700 ton displacement may well be a light displacement rather than full load, so it may well be much more than twice as large as the 4500 ton full load Bertholf class NSCs.
While very large, this cutter does not carry much of the military style equipment found on the Bertholfs, no airsearch radar, no medium caliber gun, no radar firecontrol, probably no ESM or electronic countermeasures. It also looks like it is only expected to operate one helicopter.
Apparently the photos came from twitter.