Type 99A1: The Type 99A1 is the latest version in service of the PLA while the the more advanced variant the Type 99A2 is still in various trials and is not expected to enter service before the end of 2009. While the earlier Type 99 that entered service several years ago had additional armor packages on the original Type 98 turret and the chassis, the Type 99A1 has its turret top reshaped, having the hump on the turret's top removed by thickening it. This might be the result for changing the height of the turret itself to improve more protection or more space for the tank commander and gunner. Other distinct details are the armor packages on the front and at its sides, the ERA panels have been extended. The Type 99A1 might also have received further upgrades in terms of targeting computers etc.
Type 99A2: The much-improved Type 99 variant, with many major upgrades and improvements. Improvements are so significant that the A2 can almost be considered as a new tank. Some of the improvement and upgrades include a reaction improved aiming system, a digital battlefield information terminal, a newly designed arrow-shaped armor, a larger turret, an expanded tail chamber, an Active Protection System mounted on the turret with millimeter-wave radar, a new commander's periscope and an Integrated Propulsion System
Type 99KM: Newest and much-improved Type 99 variant, with upgraded modular active protection system, upgraded JD-4 active laser defense system, and is armed with a 155 mm gun capable of launching missiles and next-generation kinetic rounds. Reports have it that the Type 99KM is at least 10 years ahead of other MBTs.