Hello, I am a vocal music teacher! These questions of yours are actually misunderstandings in self-cognition. In fact, your singing has no real voice and weak voice, which is actually caused by the music sung by many popular singers now, because many packaged commercial singers are not good at vocalization, and under the influence of drooling songs such as karaoke for a long time, it is inevitable that even these basic problems cannot be solved. Singing is not mysterious. The so-called lack of true voice means that your voice is not leaning on the vocal cords, which means that the vocal cords are not fully vibrated when you sing, which is what you call the feeling of emptiness. There is a saying that I hope you can remember: "adding melody and emotion to your speech is the highest and most natural state of singing!" " Imagine that you are talking instead of singing, and you can get rid of the feeling that you will enter the virtual voice state of those commercial singers when you sing. As for your second question, you don't need to understand it, because it is more difficult. I can only tell you by singing while I'm talking.