Speed

 hi my nane is kongkrit i like to be quick like chen qi

what should i do

Hi Kongrit,

Unfortunately, firstly you need to train for about 10 years.

You need to practice at a higher speed.  You can do this using multi-ball training.

Also physically you can do a lot of speed training, like short and sharp shuttles.

This is a long process.  It is great you are aiming to improve your speed.