Beauty, just like the ever-changing world of non-ferrous metal prices in Shanghai, is a realm that never rests. Every year, every day, this world sees some new trends that keep things fresh. These might be a new concept in beauty and skin care, or perhaps a new product with remarkable efficacy. However, there are always rules to follow in this realm, much like the "universal formula" in math class that can solve all kinds of problems. In fact, as long as you remember the following three magical beauty formulas and get familiar with those popular skincare products, you can level up from a newbie to an expert in the world of beauty!