WE fear the Ritz Carlton may spark an outbreak of hostilities between China and France. Gentleman hotelier Mike Matthews has brought over chef Manuel Martinez of La Tour d'Argent restaurant in Paris who all this week at Toscana is challenging Chinese gastronomes' belief that Peking Duck has no equal. Martinez has even brought his own weaponry to battle - a silver-plated press which flattens the bird in a recumbent position and allows it to be cooked in its own blood.