China has always given Pakistan Flexible financial terms to Pakistan because Pakistan has always helped China in many things to acquire. The most famous was J-7 upgrade to ground role which would not have been possible with out the help of PAF Pilots and Much more. PAC teams make constant visits to AVIC and many Chinese defence companies and we work together on many issue ever since the Mou have been signed between the countries. J-10b with WS-10 is better than any jet in the world if the integration goes all good this will be a lethal weapon.