dear only_human, it depends on what type of fish actually. My company have been shipping livestocks to various countries nearby(thailand, singapore, indonesia) but I don't know if you were to ship to china, i think it would be very risky. If you go to the shipping company, they will not take responsible if the fish is safe or not. The method of packaging is also very important, most fish are able to live up to 10 hours packed into an highly oxygenated bag filled with sufficient water. Shipping to china would be risky as it is not a short flight, there's also a risk of delay in flights.