kāishǐ qián yào wèn qīng cìshù jiàgé hùlǐ hé tuìsè xiàoguǒ bié zhǐ kàn zhàopiàn lǐ de yánsè

开始前要问清次数、价格、护理和褪色效果，别只看照片里的颜色。

Before starting, clarify the frequency, price, care, and fading effect, rather than just looking at the color in the photos.