The most noticeable update is the ZBD97 style 100mm rifled gun mount. However, in order to reduce weight, the secondary 30mm auto-cannon is reduced to a 7.62mm coaxial. The chassis is lengthen by an additional roadwheel to accommodate this new mount. This new Airborne IFV is heavier than the first generation of ZBD03. With additional Y-9 and Y-20 air-lifters entering PLAAF service, they can now afford to push firepower and armor protection further.
China's first Generation AIFV, the ZBD03, with its 30mm auto-cannon and 7.62mm coaxial mount
Standard 100mm rifled/30mm auto-cannon mount on a ZBD04A