nthach (I know you must be a Vietnamese :-): Valvoline makes Pyroil P/S fluid while dealers sell Febi P/S fluid. Different companies. Only the antifreeze coolant stuff from dealers is the same as Valvoline's Zerex G-05.
william rogers: the mentioned ATF is ATF type A, which is a very obsolete ATF that you may never be able to find in retail stores. New ATF fluids such as Type F or Dexron III/Mercon have all kinds of extra additives that may deteriorate the P/S seals and cause leaks.
So, the best and safest stuff to use for your P/S system is the cheap regular P/S fluid (Pyroil, Gunk, Coast, SynPower etc...) you can always find in auto parts stores.