You can remove the mould as follows:
Wet the bamboo tables and scrub them well with a hard brush. This will deeply clean the bamboo tables and remove mould and other dirt. For stubborn dirt, you can use a little bleach or green soap.
Rinse the tables well with clean water and then let dry.
Next, sand the tables with a sander the same way you would treat solid wood. Start with medium sandpaper and finish with fine sandpaper. Make sure you sand the tables evenly with the grain. Sand until the old lacquer layer is gone.
After cleaning and sanding, it is important to seal the tables immediately with a bamboo-suitable wood oil, synthetic resin or water-based epoxy lacquer.