The ZTZ99 is considered the most advanced main battle tank (MBT) of the PLA. The ZTZ99 provides a significant improvement in firepower, mobility, and security compared to older Chinese-made tanks. A few of the ZTZ 99 ' s technologies have already been always upgrade the less expensive ZTZ96 MBT. The hull for the ZTZ99 is very similar to that the T-72, it is about one metre longer. The turret and hull are of all-welded steel armour construction. The front arc on turret may be added with a layer of composite armour, or arrow-shaped spaced add-on armour modules. The armour package is of modular design, enabling damaged parts to be changed or upgrades installed throughout solution life