1. First of all, in the game Run the Kingdom of gingerbread man, the task of the castle is the main way to obtain upgrade materials and gold coins, and upgrading the castle requires a certain amount of upgrade materials.

Secondly, upgrading the castle requires a lot of gold coins. In addition to getting gold coins by completing tasks, players can also get gold coins by selling extra props and mining minerals. After meeting the upgrade conditions, players can start upgrading the castle.

3. It takes some time to finally upgrade the castle, and players need to wait patiently. After the castle upgrade is completed, players can get upgrade rewards.