CityHolder, a blockchain-based game on BitJie, has unveiled its daily combo and quiz rewards for December 20, 2025. Players can earn $CITY tokens by completing combo tasks, which involve upgrading various structures such as residential, commercial, and industrial buildings. Each successful combo task rewards players with 7.5 million $CITY tokens. The game integrates strategy and economic management with blockchain technology, encouraging players to understand game mechanics and manage their investments effectively.