What is your suggestions of shopping malls in HongKong?

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I'll be leaving next week to HongKong. I heard that there will be no sale during those period. I wonder if you know any good malls that offer cheaper prices and good quality? I will buy pants, clothes, cellphones, and shu uemura face products and other stuffs. How bout good books? Are there any good books that are not available anywhere? Or are there any other tourist spots out there? Thanks! =)