Yes they will remain in service. Do you have any pic/video of 130mm field gun Type 59-1 on LOC?
One Panter came for trials, but the type never made it to Pakistan Army service.
Army scrapped the 155mm towed howitzer tender, procured 36 D-30 howitzers at a low price of US$ 150,000 each, KH-179 upgrade to in service M114 howitzers is being considered along with new base bleed ammo production at POF (under license from a European company), so that the 39 caliber howitzers could fire to a range > than 30km and the 52 cals over 40km.