Here's the translation for your tile leveling guide:

Here's the translation for your tile leveling guide:

‌How to Fix Uneven Tile Joints? The key is to choose the right method based on the height difference:‌

‌For 1-3mm minor height differences:‌

• ‌Grout Adjustment‌: Fill the gap with grout or caulk to level it by controlling the grout thickness. It's simple and cost-effective.

• ‌Edge Grinding‌: Use sandpaper or a grinder to slightly smooth the higher tile edge until it aligns with the adjacent tiles. Be careful not to damage the glaze.

‌For height differences over 3mm:‌

• ‌Tile Leveling System‌: Insert the leveling tool into the joint and use the adjusting screw to raise the lower tile or lower the higher one. Once set, remove the tool. This method doesn't require removing tiles but requires some skill.

• ‌Partial Reinstallation‌: Carefully pry up the problematic tile, clean the substrate, and reinstall it with adjusted mortar thickness. Use a level to check for flatness during installation.

‌Other Auxiliary Methods:‌

• ‌Shim Adjustment‌: Attach plastic shims or tile fragments to the back of the lower tile with adhesive to add height.

• ‌Epoxy Resin‌: For larger height differences, use epoxy resin to fill the gap, then sand it smooth after curing.

‌Precautions:‌

• Ensure the mortar is not fully cured before attempting any adjustments, as it will be difficult to fix otherwise.

• When using leveling tools or shims, apply force evenly to avoid cracking the tiles.

• If the height difference is very large (e.g., over 1cm) or you're not confident in handling it yourself, it's best to contact a professional tile setter.