Because it wasn’t communism in the first place, because communism won’t work in a vacuum. Xi Jin Ping know they would have more leverage if they run in capitalism with some socialism law in place, so they let business/corporate run wild and reeling in if they go too far. That’s exactly same as USA but with more teeth. People who tell you China is communist is either a bunch of tankie that trying to lie to you, or the communism in this case simply mean authoritarian.