The ZTZ59D1 (Chinese: ZTZ59D1式中型坦克; industry code WZ120C) was the prototype for what would later become the ZTZ59D in PLAGF service. Although the PLAGF had already upgraded part of its fleet of Type 59 tanks with domestically-produced 105 mm cannons, further enhancements were planned to improve protection and its FCS at a more economical cost. These improvements included FY-1/2 ERA to counter different types of threats and a new digitalised FCS. The modified tanks, designated WZ120C, passed certification in April 1995, featuring technologies that would later be used in the ZTZ59D, aside from the main cannon. These tanks remained in service with the PLAGF armoured corps until gradually being replaced by wheeled assault guns or the ZTQ15.

Introduced in Update 1.91 "Night Vision" alongside the Chinese tech tree, the ZTZ59D1 represents a comprehensive upgrade of the venerable Type 59. It incorporates numerous modern features onto an older chassis, most notably the addition of ERA arrays on the hull and turret cheeks. The original 100 mm Type 59 cannon has been replaced with a licensed copy of the widely-used Royal Ordnance 105 mm L7 cannon. Night vision and a laser rangefinder have also been installed, significantly enhancing the tank's firepower. Unfortunately, it still suffers from many of the Type 59's limitations, including subpar mobility and gun handling. While it may not excel in the high-speed combat typical at its rank, a skilled and careful commander can still find it a formidable sniper.