For the ZBD2000, it says under Programme "Compared to the BMD-3, the Chinese airborne combat vehicle is slightly higher, and its main gun (25mm) differs to the Russian design (30mm)," but under Armament, it says "The main armament of the IFV variant is a 25mm cannon..." Then under specifications, it is "Weapons: One 30mm cannon." So I'm wondering if it's the 30mm or the 25mm? Thank you.