1. First Type
Pull up one side in the direction of the arrow and pull down the other side in the opposite direction.
2. Second Type
Press the buckle in the direction of the arrow to open it.
3.Third Type
Press down the buckle in the direction of the arrow to open it.
Reset and Tighten the Third Buttons
When you open and close the buckle for a few times and the buckle does not stay clasped, you can try this method to reset and tighten the clasp.
Push the buckle out gently in the direction of the arrow and push it back again, then the buckle will stay clasped and will not come loose again.