 Salyut supplies AL-31 variants to fighters operated by the People's Republic of China.The J-10 uses the AL-31FN while the J-20 uses the AL-31FM2 as an interim engine until the domestic WS-15 is ready.According to Saturn's Victor Mihailovich Chepkin, chief designer of the 117 and 117S engines, the Chinese WS-10 was developed with the aid of the AL-31's maintenance technical documentation., this was recently confirmed by AVIC 

Intended to power the fifth-generation Sukhoi Su-57 fighter, the "izdeliye" 117, or AL-41F1, is a highly improved AL-31F derivative, with some application of technology from the Saturn AL-41F.