Are you seriously saying that JF-17 Block 3 is anything to a EFT with AESA + Meteor?
EFT is a monster air-supremacy fighter with canard-delta design and powerful engines. It will totally dominate the JF-17 in the high-altitude BVR kinematic environment.
Meteor uses the best of EU missile tech and will have an edge over PL-15, although I think the Chinese missile will be quite good.
Radar and electronics of the latest EFTs will be better than the equivalent package in the JF-17 Block 3 as UK tech is still better(slightly) than that of the Chinese, and the radar of the JF-17 will be anyway quite small and radar size matters in a fighter aircraft in BVR warfare.
Russian aircraft are junk and just because JF-17 can stand up to the SU-30MKI means nothing when it comes up against a monster air-superiority fighter like the EFT.
Try 3 JF-17 Block 3 against 2 EFTs with FOURTEEN Meteor missiles each in "beast mode" and see the results when the EFTs use their kinematic advantage to target the JF-17s from BVR range.
Uk ahead of China technologically? What a joke, most of their electronic imports are from China, they were even about to give Chinese Huwei 5g contracts until the Americans threatened them. China is far ahead of the UK in technology. I doubt you have any knowledge of military technology other than what you read online
most American/European weapons use chips/semiconductors that are MADE IN CHINA, even a recent Pentagon report shed light to this.
EFT was developed in the 80s to face soviet threats. The JF17B3 was developed in the last few years for MODERN THREATS. From the AESA radar, to EW systems, to the Link 17 C3 system, the JF17B3 has more modern avionics that are atleast a decade or 2 ahead of the EFTs. These systems are used to primarily gather data and communicate the data to make INFORMED decisions based off of information.
Sure the EFT has superior engines and thus performance (Just as the SU30 does on paper), but you have to remember the side which has better C3I communications ie ground radars, AWAC radars, and synergy will have far more information and thus will be able to make better decisions in combat. The JF17 was built around this synergy similar to the Gripen.
Lastly having EFTs without any basic infrastructure such as ground radars, AWAC support, Arial refueling tankers, and support systems would be pretty useless. Making a jump from F7s/Mig29As to the EFT itself is a difficult challenge and will take a decade or more to have in place (training/support). Its much easier to make baseless claims on forums and fantasize than making it happen in reality.