1, singing must be open, especially the voice. The more you can't open it, the more you dare to sing, the more ugly it is;
2, the head should be slightly lower, but not too low, the action of the head should be opposite to the melody, the higher the head is slightly lower, the sound seems to go down to the chest;
3, singing should be "full of sound and emotion", practice is very important, when you practice mature, your attention will come to the mood when singing.