I agree with u adm_havemercy that Su-30 is some how batter then JF-17 but u shld accept this truth that JF-17 can counter ur all other fighters Mirage, MiG-29 ,Jaguar, MiG-21 & ofcourse compete with MiG-27.
Besides that Chengdu Aircraft Industry Corporation & Pakistan Aeronautical Complex are putting their best to take it for 4.5th generation like.
1) use of composite materials in the airframe to decrease weight.
2) Chinese Infra-Red Search and Track (IRST) system.
3) New engine; most likely the Chinese WS-13 TianShan, although the PAF is considering fitting European powerplants such as the French Snecma M88 to its aircraft.
4) Minor airframe modifications to reduce the aircraft's radar cross-section by adding stealthy features
5) Beyond the initial 50 PAF JF-17s, the remaining production aircraft may also be equipped with European avionics, radars and weaponry.
6) New Radar options for JF-17 are the Italian Galileo Avionica Grifo S7, and the French Thomson-CSF RC400, a variant of the RDY-2 radar, along with the MBDA MICA short/medium range air-to-air missile.
After all addition of these above features, I asure u that JF-17 wouldn't be easy for SU-30.