Heroland is an SLG mobile game based on blockchain technology with gameplay as its starting point and foothold. Our design idea is to give full play to the entertainment and educational significance of the game. While bringing game value to users, we use blockchain technology to make the game run in an open and fair environment to ensure game fairness and asset safety among players. In Heroland players can own their castles for free, acquiring assets and fortifying castles through castle building, heroes recruitment, resource gathering, PVE and PVP.