Perkins Engines (Tianjin) Limited (PETL) was a joint venture of Perkins based in Tianjin, China formed in 1997. Perkins pulled the license in 2007, but Tianjin Perkins/Perkins (PETL) engines continued to be marketed. Perkins called for the liquidation of the joint venture in 2007 after discovering "irregularites". Engines have been marketed as Perkins Lovol, Perkins (Tianjin), Perkins (PETL) and other such brands. These engines were used in many Futian and Foton tractors.