Original 200+ J-10A (produced before 2011) installing Russia AL-31FN jet engines, and 2011 China ordered another 200+ AL-31FN engines from Russia as old J-10A's replacements. Recent years new J-10A and future J-10B fighter mainly installing domestic WS-10 jet engines, China will reduce AL-31F & AL-31FN import numbers.
If I remember right, China's only foreign defense related purchases last year were engines. Not only that, but the purchase pattern looks like they bought just enough to replace existing installations and one more year of production and stock up before Russia/Ukraine stops selling them to them. In other words, China thinks its about 18 months before WS-10 (and other) engines are deemed good and production is flowing.