Watch how this girl uses her non-hitting hand and transfer her weight foward to hit the ball.
Lesson we can learn from this girl
1. She hit the ball from low to high.
2. She uses a Semi-western grip commonly uses to generate topspin and perform a C-swing.
3. She rotate her body from side to the front to hit the ball.
4. She uses her left-hand (non-hitting hand) pointing to the side (between 2 to 3 0'clock) and then move her left-hand away, pushing her weight to the front to hit the ball.
5. After hitting the ball, she perform a follow-through.