Announcement from Ouyi on Adjusting the Grading Level Rules of RAVEUSDT Perpetual Contract Dear Ouyi user: In order to further enhance market liquidity, Ouyi plans to adjust the gradient level rules of the RAVEUSDT perpetual contract from 6:00 pm to 8:00 pm (UTC+8) on April 13, 2026. The specific adjustment plan is as follows: contract gear Before adjustment adjusted The highest number of images in this file maintenance margin requirement Minimum initial margin rate Maximum available leverage ratio The highest number of images in this file maintenance margin requirement Minimum initial margin rate Maximum available leverage ratio RAVEUSDT perpetual contract one 2,800 2% 5% twenty three hundred 2% 5% twenty two 5,500 3% 6.66% fifteen six hundred 3% 6.66% fifteen three 8,200 4% 8% twelve point five zero nine hundred 4% 8% twelve point five zero four Each level increments by 2800 Increase by 0.5% per level Increase by 0.5% per level The highest leverage ratio corresponding to the gear position Increase by 300 per level Increase by 0.5% per level Increase by 0.5% per level The highest leverage ratio corresponding to the gear position Please note that due to market conditions, the adjustment time of some currencies may change or be postponed. Please confirm whether the adjustment of the relevant currency has been successfully implemented through the explanation of the position level. Risk Warning: Due to recent market volatility, the maintenance margin rate for user positions may increase after adjusting the gear rules. To prevent forced liquidation caused by rule adjustments, please reduce the actual leverage ratio in a timely manner by closing positions, reducing positions, and adding margin to control risks. Ouyi will continue to provide you with better products and services! Ouyi Team April 13, 2026