By releasing their models, they effectively sabotage the entire US AI industry, and given that that is underpinning a sizeable % of US GDP at the moment, therefore sabotage the US economy.
That may not be their intention. The USA is also their biggest customer, after all. But it does show that there are other strategies that might occur to China that don't reflect the knee-jerk reflex to restriction and control that Anglosphere governments have around tech.