Do you mean "Schwarzkopf Professional"? I bought it at "意髮逸", they've both 3.1 and Schwarzkopf. I know 3.1 is also good but the sales lady told me Schwarzkopf is more convenient. Remember to bargain for a lower price. (original price around $300-350)
address: 馬鞍山 新港城商業中心