[PRPLYR]

Haifu National Yellow: Ma Long! Easy to use, it is balanced for control. The oil is a brown fluid. It makes the rubber fast, more elastic and a little bit softer. You can put one or also without problems two thin layers. With hard rubbers you can use all three versions, but if you are using not so hard rubbers, the National Yellow is the best choice (perhaps also the National Blue, but of course not the National Black).

Haifu National Black: Wang Chuqin! You must take care not to use too much of this black booster, it is aggressive for speed. The oil is a black fluid. It makes the rubber significant faster, more elastic and softer. You should not put more than one layer, to prevent that the rubber gets too soft. If you need power, the National Black is your friend - but I don't recommend it if you'll have a lack of experience with boosting rubbers.

Haifu National Blue: Fan Zhendong! It's like a combination of the National Yellow and the National Black, a mixture of the two, well balanced for feeling and power. If you know how to use this booster, it is the best, but currently nearly impossible to buy if you don't know where. The oil is a white fluid. It makes the rubber noticeably faster, more elastic and softer and offers the best feeling (but if you will use Haifu booster the first time, I recommend to start with the National Yellow to make your first steps). You should put one thin layer and if you consider to put a second layer, be careful, perhaps start with one and next time you can try a second layer.

If you want to know more pro-players which version they are using, let me know.

Don't forget: If your rubber will be not fast and bouncy, you did something wrong, most likely you didn't wait long enough and startet to assemble the rubber too early. The best players in the world are using the Haifu National Boosters (besides one other fluid which is especially designed for the made in Germany rubbers), so there are no reasons to doubt the effect, you only must know how to use it. If you need practical recommendations, let me know.