Generally speaking, every provincial capital city will have a quality supervision and testing center for jewelry and jade, and the most authoritative of these institutions is the National Quality Supervision and Testing Center for Jewelry and Jade.
We can also judge the authenticity of jadeite by observing the internal structure such as color root, flying wing and orange peel. Natural jadeite will not react under ultraviolet radiation. Once there is a fluorescent reaction, it must be a fake.