Almost all public companies have shareholders from all over the world, including China. While Opera might not be a Chinese company in the strictest definition,

Almost all public companies have shareholders from all over the world, including China. While Opera might not be a Chinese company in the strictest definition, over 50% of Opera's shares are owned by their Chinese parent company, and by all accounts around 80% of the shares still seem to be in control of the Chinese conglomerate that owned Opera before it went public.