Hong Kong actor Ray Lui is known for his age-defying looks. 

Recently, he shared his secrets to his youthful health on Chinese social media Xiaohongshu. 

Although officially 70 this year, Lui says in the post that his biological age is only 39 – a claim backed by a recent methylation test.

According to Lui, as translated by Dimsum Daily, the test showed his cardiovascular age at 43, his immune system at 44, and his endocrine system at 39, giving him an overall biological age of 39.9.