Well the 054A+ Jiangkai II shown above was just an improved 054A frigate (3500~4000DWT). What you see above is a future version with modernized phased array versions of air search, surface gun control, and navigational radars and featuring improved stealth. These will cost in the range of USD 350 Million or three for a Billion (as offered to Thailand in 2013). China lost out to Korea on that bid.
The numbered version that you may be talking about is the heavy corvette C28A (3000 DWT) as supplied to the Algerian Navy. The Algerians got three so far (2016) and have options to get three more. This (although named a heavy corvette) is larger than a lot of frigates, and if inducted, would be even larger than the Samudra Joy class.
There was lots of talk in Bangladesh Navy circles about getting that one as a stopgap measure between now and the 054A+.
Images of the third Algerian Navy Corvette C28A 'Ezzadjer'
https://en.wikipedia.org/wiki/C28A_Class_Corvette