The main reason for singing well is not how high you can sing. If you can sing c3 (Hi C), just like ordinary tenors David Jiang and Yan Weiwen, you can sing c3, but now there are basically no c3 works in their famous works or records. David Jiang's highest is "Galloping the Battlefield" b2, and Yan Weiwen's songs are generally a2. Why? This confirms the above sentence "The main reason for singing well is not how high you can sing". Although you can sing c3, due to age and some reasons, your most beautiful timbre will definitely not be c3, but the voice below c3 will sound more resonant and aesthetic. So try not to smoke when singing, and choose a comfortable range stage. Only in this way can we play the timbre well.