How to play the two high notes of Erhu 53 in Good Night?

The outer chord is a high note 5, just in the middle of the chord weight and code. If you are not familiar with it, you can measure the exact position and make a temporary mark on the pole for reference. Take it apart when you are skilled.

When pulling, use three fingers, that is, the middle finger of the left hand, to slide from treble 3 to treble 5, and then slide back to the position of 3. The whole movement should be coherent and natural. When sliding down, the wrist moves down first, driving the fingers to slide. When sliding, the wrist first raises the body and drives the finger to slide back to three places.