There are both real and fake things on Alibaba.

Alibaba is just a platform. The goods in it are sold by various merchants. The authenticity of the products still depends on the merchants. However, the stores on Alibaba are all enterprises, so generally there will be no fakes. If they make fakes, it will be a self-destructive sign.

There are all kinds of birds in the forest. Even if they are all corporate stores, you should pay attention when buying products. It is best to trade on Alibaba, not on third-party platforms. If you are cheated on a third-party platform, Alibaba platform will not care, and there is no protection for yourself.