Just use boiling liquid to break up the jelly powder, cool it and it will become jelly!
It depends on the flavor of your jelly powder. If it is tasteless, as long as the drink is heated above 80 degrees. That's it.
If it is jelly powder with a good flavor, just add boiling water!
Do not shake before cooling to avoid affecting the appearance.
The mixing ratio is about 1:20 and 20% water!