# Collectibles NFTs

## 1.Time Coupon NFTs

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Time Coupon is one of the digital goods in the Orbcity ecosystem. Users can burn Time Coupons to reduce the amount of time required in-game. Time Coupon is used to Building NFT evolving, level up, District Minting and etc. Since used Time Coupons are burned, it inherently contains a constant level of circulating supply and value. It's given to users via Laybouring or campaigns. It can be sold on the marketplace or used in-game for a better gaming experience.