The sharp symbol in the middle of the staff usually refers to the sign of sliding or decorative sound. This symbol refers to the right, which means that this note needs to slide from left to right or play quickly.

The specific playing method will be different according to the specific music style and instrument type. For example, if it is a violin, this symbol may mean that you need to slide from one note to another, or touch the strings quickly with bow hair. If it is a piano, this symbol may mean that you need to slide your fingers across the keyboard or use the pedal to create a special effect.

It is recommended to consult the music score to see if there are any specific playing instructions or marking instructions. You can also refer to the playing video to understand how to play it.