1. Rotate to open: The lids of some fruit juice candy cans are designed with threads. You can try turning the lid counterclockwise to see if it can be opened.

2. Press open: Some juice candy tin boxes are designed by pressing open. You can find a raised button or a recessed area on the cover, press it with your finger and try to gently rotate or lift the cover.

3. Pull open: Some fruit juice candy cans have a lid with a pull ring. You can hold the tab with your fingers and gently pull the lid open.

4. If the above methods can't open the tin box of fruit juice candy, you can consult the instructions on the product package or refer to the product manual for more detailed guidance. If the problem remains unresolved, you can contact the seller or manufacturer for more accurate guidance.

Please note that different juice candy tin boxes may be opened in different ways. Please be careful not to hurt yourself or damage the packaging before using any method.