http://www.defense.gov/pubs/2013_China_Report_FINAL.pdf
Interesting information - relating to this particular thread we have:
The PLA Air Force (PLAAF) conducted
unprecedented bilateral training during 2011,
including its first bilateral air exercise with
Pakistan and training with air forces in Belarus
and Venezuela... pg 2
Chinese companies sell mostly to developing
countries where China’s low-cost weapons
sales serve a strategic purpose. For example,
China maintains strong and longstanding
military–technical cooperation with Pakistan,
which includes arms sales and defense
industrial cooperation...pg24
Pakistan remains China’s primary customer for conventional weapons. China engages in
both arms sales and defense industrial cooperation with Islamabad, including co-production
of the JF-17 fighter aircraft, F-22P frigates with helicopters, K-8 jet trainers, F-7 fighter aircraft,
early warning and control aircraft, tanks, air-to-air missiles, anti-ship cruise missiles, and
cooperation on main battle tank production... pg 53
Page 72 onwards has a list of all joint exercises of PLA.