LAMP.Just because Pakistan was involved in the K-8 and MBT-2000 projects from initial phas that does mean that the jets and tanks in Myanmar and BD inventory were manufactured in Pakistan.
While PAC transferred some front fuselages to China from 2002-2006 But Since 2006/2007 Hongdu produces all the parts including the stabilizer, rudder, front fuselage etc at its own facilities and does not import any parts from Pakistan for the K-8 it exports or manufactures for PLAAF.
Any senior Sinodefence forum member can confirm this.
While Pakistan produces the above mentioned parts(stabilizer, rudder, front fuselage)for it's own K-8s rest of the parts are imported from China.
The last time PAC exported products to Bangladesh were some spares for FT-6 and A-5s during Khaleda regime(both retired now).
While Sri Lanka did purchase from PAC some O-rings, gaskets for F-7s in 2004 but no spares for K-8s were sourced from.Pakistan