The Type 99, also known as ZTZ-99 and WZ-123, developed from the Type 98G (in turn, a development of the Type 98), is a third generation main battle tank (MBT) fielded by the Chinese People's Liberation Army. It is made to compete with other modern tanks. Although not expected to be acquired in large numbers due to its high cost compared to the more economical Type 96, it is currently the most advanced MBT fielded by China. The ZTZ99 MBT is a successor to the Type 98G tank manufactured for the People's Liberation Army (PLA).

At the end of 1970, the Type 122 Experimental Medium Tank project was aborted after three years of development. In February 1977, work on a second-generation PRC tank was begun, and in April 1978, the development goals for the new project were set. The Soviet T-72 was the tank's primary projected combat target. In March 1979, Chinese government Institutes 617 and 201 developed the new Type 1224 experimental chassis, which had been installed with the MB8v331TC41 model tank imported from Germany. Later, another two models were developed, the Type 1226, with the "8V165", a 763 kW, 1,000-horsepower diesel engine by Factory 636, and the Type 1226F2, with the "12V150" 763 kW, 1,000-horsepower engine by Factory 616. All three prototypes were armed with 120 mm smoothbore cannons. Ammunition was placed behind the turret, similar to the design philosophy of the German Leopard 2 A1.

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