You can join those well-known brands, such as Shiseido and L 'Oreal, but the cost will be high and the consumption will be high. But because of its high popularity, consumers can rest assured that women are absolutely willing to spend money on their faces. It depends on the consumption level in your city.

Is Pin Sang-soo Korean? I'm sorry I haven't seen it, but Korean brands are very popular recently. You can take your friend to his shop for a facial treatment, and then come back to see how it works, and then decide whether to join.