Mastan Sahab, the reported range for SD 10 was 70 km and this was back in 2003. At the pace China has been progressing in the field of Defence, its quite probable the missile has been improved further and the range has improved. China is investing billions of dollars when it comes to their defence needs, they are outspending everyone besides the Americans and they are delivering results in rapid times. Emerging Chinese 5th Generation Missiles such as PL 13 look very promising, i would say give it time because the Chinese like the Americans can run simultaneous projects at the same time. Look at the strides they have made when it comes to their Air Force, Navy and Army in the past 2 decades.
Besides, SD 10 is not the only BVRAAM in PAF's inventory. As Shamim Sahab has disclosed, PAF is in possession of R Darter and its range is 120 KM. Nobody here is suggesting that JF 17 is superior to SU30MKI, if you compare them on paper than obviousally SU30MKI is superior. But in reality, wars are not fought on paper. If proper tactics are used and JF17 is armed with 5th Generation BVRAAMs and WVRAAMs, than it levels out the playing field. In the end, the side which is better trained and employs their assets properly will come out as the winner. SU30MKI isnt the Raptor, dont believe all the hype that has been created by the Indians. You would be surprised with the sort of tactics that PAF has developed, its not something that they fear. JF17's linked with Erieyes/ZDK 03, TPS 77/YL2 and SAM support is very formidable defence if you ask me.