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why is Yves Saint Laurent so popular？
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How often do you buy YSL products？
Do you think using YSL will achieve the desired effect？
How much money is spent on YSL products every year？
What are the YSL skin care products you have purchased？
What do you want most is the effect of YSL skin care products？
What kind of promotion do you expent from YSL？
Compared with other cosmetic brands ，which one is better？
What attracts you to the YSL store？
For YSL products ，do you prefer to buy a single piece or a set？
How do you mainly buy YSL products？
