The Jaguar was a joint Chinese/US project between Cadillac Gage and the China National Machinery & Equipment Import & Export Corporation with the intent of modernizing the Type 59 tank and its variants in the mid-1980s. The political fallout of the Tiananmen Square Massacre forced the US and Chinese teams to part company in 1989. Cadillac Gage continued development of the Jaguar on its own, but there was no market for the tank since it was glutted with used tanks after the Cold War.
Source:
http://www.military-today.com/tanks/jaguar.htm
Source:
http://www.military-today.com/tanks/jaguar.htm