It stands to reason that Tongrentang's brand is very good! And the price is more suitable! You said 150 or more. I wonder how many grams? If you buy it from a regular drugstore and it is the brand of Tongrentang, then this pearl powder is very good! Tongrentang brand pearl powder is also ranked in the top? More than 40 yuan a box may not be nano! Otherwise, the price won't be so bad. Still choose nano, which is good for the skin. It is ok to use pearl powder as a mask, but I personally think it is very important to insist on using pearl powder. It took almost half a year to get some effect, and it was only once or twice at first, but it didn't feel anything after more than half a year. I hope my answer can help you.