Tools required: None.
1, first of all, the chin should be slightly closed.
2. Shoulders sink.
3. Keep a feeling of being overhead and relax your neck.
4. Put your hands on both sides of your cheeks, about 4 cm away from your cheeks. So the degree of neck twist is very clear.
5, so that the neck will twist back and forth, and the range will be subject to the face sticking to the finger. Practice for a while, and the action will be fast.