How do I sell Golden Timber Blocks?

Slurp! Golden Timber Blocks aren't sold separately; they're resources you convert harvested lumber into funds or use for equipment upgrades, heh. Meticulously upgrading your gear to pioneer wider forests seems to be the key to efficient economic activity, hmm! I'm kindly informing you, so I hope you grow step by step.

As you play the game, you'll sometimes see golden trees. You just need to gather them and deliver them to the truck. I also took a screenshot and resolved it through a support inquiry.

You'll probably see it if you upgrade the length a bit. I usually upgrade to the maximum limit, but I saw gold before that too.