What's so good about Jacky Cheung singing?

He handles light and heavy sounds well, the bass is thick, and the treble doesn't sound sharp, so it will be natural in the transition between high and low. This feature will be obvious when listening to the live version of the concert.

Other singers don't have this tone. A song, even the whole concert, is in the same tune, which makes me feel boring.

His voice is very emotional. Even though he is smiling and singing, his voice is still so affectionate.

Other singers don't have this ability. They often pretend to be intimate, but their voices are very dull.