Announcement from Ouyi on the official launch of ZBT (ZEROBASE) perpetual contract before trading Dear Ouyi user: Ouyi will soon launch ZBT (ZEROBASE) pre-market trading. The specific schedule is as follows: Online time * ZBT/USDT pre-market trading opening time: 7:30 PM on October 17, 2025 (UTC+8) ZEROBASE is a decentralized encryption infrastructure network that enables verifiable off chain computing through zero knowledge proofs and trusted execution environments. *English full name: ZEROBASE *English abbreviation: ZBT *Project official website: https://zerobase.pro/ *Twitter: https://(x.com)/zerobasezk Pre market trading allows users to trade perpetual contracts on currencies that have not yet been published. Pre market perpetual contracts are essentially USDT based perpetual contracts, which are usually converted into standard perpetual contracts after the new currency is launched on the cryptocurrency trading market. Ouyi launches pre market trading function, aiming to provide users with a secure and reliable platform to participate in the discovery of new currency prices. *Pre market trading contract Contract Elements | Details| Underlying Contract | ZBT/USDT Index (the index takes the latest transaction price of the contract)| Settlement cryptocurrency | USDT| Face value of the contract | 10 ZBT| Price quotation | quote based on 1 ZBT USDT price| Minimum price change (Tick size) | 0.0001| Leverage | 0.01~5 times| Funding rate | Fixed 0.03% daily rate| Funding fee settlement interval | 4 hours| Trading hours | 7 x 24 hours| Contract type | Perpetual contract| Conversion time | Pre market contract conversion standard perpetual contract date has not been determined yet. Pre market trading contracts are usually converted after the currency is listed on the cryptocurrency market. The conversion time will be announced separately once it is determined| In addition, the pre market trading market and the standard perpetual market have different product mechanisms, and the gradient level limit rules are as follows (please refer to the pre market trading product rules for details of other trading rules): *Gradient gear limit rule Position | Maximum Open Position (Number of Cards) | Maintenance Margin Rate | Initial Margin Rate | Maximum Leverage Ratio| 1 | 8,000 | 20.00% | 10.00% | 5.00 | 2 | 15,000 | 25.00% | 13.00% | 4.00 | 3 | 30,000 | 33.00% | 18.00% | 3.03 | 4 | Increase by 25000 per gear | Increase by 2% per gear | Increase by 2% per gear | The highest leverage ratio corresponding to the gear| Prepare to trade and recharge your USDT balance to prepare for ZBT/USDT pre-market trading: Risk statement *At present, the project party has not yet determined the final coin issuance plan, and there is uncertainty in the total issuance volume. If the issuance volume changes, it may cause market price fluctuations. Users need to pay attention to market information on their own, pay attention to risk control, and trade cautiously. *The price in the pre-market trading market is determined by the market behavior of both buyers and sellers, and may not accurately reflect the actual issuance price of the new currency. *Ouyi does not guarantee that the currency of the perpetual contract before the market will eventually be listed in cryptocurrency trading. Please follow the latest coin listing announcement from Ouyi for specific details. Ouyi may at any time decide to suspend trading of such pre market contracts at its own discretion. For more detailed information, please refer to the Ouyi Service Terms and Risk&Compliance Disclosures. Ouyi will continue to provide you with better products and services! Ouyi team October 17th, 2025