Scalp massage with a scalp gua sha

When I go to a massage shop, they start by loosening up my scalp before the facial massage. I've heard that since the scalp is part of the facial skin, properly loosening it up is an important method for improving elasticity and lifting sagging skin. I often use a wooden gua sha designed for the scalp, scraping it like I'm combing it or massaging it by pressing firmly as if I were applying acupressure!