1. True Rejoice Shampoo is mostly mild and non-irritating, and it has no peculiar smell and is a very comfortable fragrance. Fake shampoo will have a pungent smell.

2. The real shampoo bottle is very strong, with a certain thickness and hardness. Fake shampoo bottles are easy to be pinched and deformed because of poor workmanship, soft and thin texture and poor quality.

3. True Rejoice Shampoo has stronger cleaning power. Put the iron sheet in real shampoo, and the iron sheet will fade. Put iron pieces in fake shampoo, and the iron pieces will not fade.

The bar code, words and pictures on the real shampoo bottle are very clear. The pictures and words on fake shampoo bottles often appear unclear and fuzzy, and some even have no bar codes.

Real shampoo is opaque when viewed in the sun. This fake shampoo is granular and transparent.

6. There is a difference between true and false shampoo bottles. Generally, the dark color is true and the light color is false.

References:

Baidu encyclopedia-hair care

Rejoice China official website-Rejoice shampoo is true and false.