Announcement from Ouyi on Launching XPL (Plasma) Spot Trading and Converting Pre Market Contracts to Standard Perpetual Contracts Dear Ouyi user: Ouyi is about to launch XPL (Plasma) and convert XPL pre disk contracts to standard perpetual contracts. The specific schedule is as follows: Online Time * XPL Open Deposit Time: September 24, 2025 at xx:00 PM (UTC+8) *XPL call auction time period: 8:00 pm to 9:00 pm on September 25, 2025 (UTC+8) *XPL/USDT spot trading opening time: 9:00 PM (UTC+8) on September 25, 2025 *XPL/USDT pre-market contract conversion time: within 3 hours from 9:00 PM (UTC+8) on September 25, 2025. During this period, as long as the index remains stable, we will complete the contract conversion. *XPL Open Withdrawal Time: 00:00 AM (UTC+8) on September 26, 2025 Project Introduction: Plasma is a Layer-1 blockchain designed specifically for stablecoins, aimed at providing high performance, scalability, and security. *English full name: Plasma *English abbreviation: XPL *View Plasma prices: https://www. (okx.com)/price/plasma-xpl Risk control rules for spot opening Order restrictions: To protect investors from the impact of price fluctuations during the initial launch of the new currency, Ouyi will implement the following restrictions within the first 5 minutes after the start of spot trading: *Market order trading is prohibited. *The maximum amount for each limit order is $10000. *The maximum net holding amount for a single user is $10000. The above restrictions will be lifted 5 minutes after the start of the transaction. Price limit rules: After the new currency is launched, if the index price does not exist or is unstable, the platform will adopt a limit price rule based on the closing price. When the coin pair has a stable index price, the platform will activate an index based limit mechanism. Calculation rules for limit price based on closing price: Stage | Buy Maximum Limit | Sell Minimum Limit| Within the first minute of the launch of the new currency, the call auction transaction price multiplied by (1+H) is unlimited| 1~N minutes after the launch of the new coin (before the index is available) | Last minute closing price x (1+H) | Unlimited| Nth minute after the launch of the new coin (before the index is available) | Unlimited | Unlimited| Index based limit price calculation rules: Stage | Buy Maximum Limit | Sell Minimum Limit| Within 10 minutes before the launch of the new coin | Index x (1+X) | Index x (1-X)| 10 minutes after the launch of the new coin | Min [Max (Index, Index x (1+Y)+average premium over the past 2 minutes), Index x (1+Z)] | Max [Min (Index, Index x (1-Y)+average premium over the past 2 minutes), Index x (1-Z)]| Attention: The platform may adjust parameters N, H, X, Y, Z or switch limit calculation rules based on market conditions, and adjustments will not be notified separately. Please visit:/trade market/info/sport to view real-time rule details. Regarding call auction The XPL/USDT spot launch will adopt a call auction mechanism, with a call auction time of 1 hour. Ouyi adopts a call auction mechanism, where you can place an order at your desired price according to established trading parameters before the new trading pair officially starts trading. The trading system will process all submitted orders according to the call auction rules and calculate a reference opening price based on these submitted orders. In order to maintain market order for all users and reduce disruptive trading experience, (1) during the call auction period, we limit the total amount of buy orders for a single user, with a maximum buy quantity of $50000 per user; (2) During the last five minutes of the call auction, users can only place limit orders and are not allowed to change or cancel orders. Please visit the OKX call auction mechanism to learn more about the rules. In order to provide more trading information, after the call auction ends, Ouyi will use the opening price of the project party at the beginning of spot trading as the starting price for the transaction. The opening price provided by token project parties is usually based on the project's valuation, and its price is for reference only. The opening price is not determined by the call auction mechanism and will not affect the price at which you place your order. Deposit USDT immediately to prepare for XPL/USDT spot trading: XPL Standard Perpetual Contract Detailed Rules: Ouyi will officially convert XPL/USDT pre-market trading contracts into standard perpetual contracts within 3 hours starting from 9:00 pm (UTC+8) on September 25, 2025. The detailed rules after conversion are as follows: Contract Elements | Details| Underlying Contract | XPL/USDT Index| Settlement cryptocurrency | USDT| Face value of the contract | 10| Price quotation | quote based on USDT price of 1 XPL| Minimum price change (Tick size) | 0.0001| Leverage | 0.01~50x| Funding rate | clamp [average premium index+clamp (interest rate - average premium index, 0.05%, -0.05%), 1.50%, -1.5%] Average premium index and interest rate calculation. For details, please refer to the product documentation| Fee collection frequency (Funding interval) | 4 hours| Trading hours | 7 x 24 hours| Gradient gear limit rule: Position | Maximum Open Position (Number of Cards) | Maintenance Margin Rate | Initial Margin Rate | Maximum Leverage Ratio| 1 | 1,500 | 1.00% | 2.00% | 50.00 | 2 | 2,800 | 1.50% | 2.50% | 40.00 | 3 | 6,000 | 3.00% | 5.00% | 20.00 | 4 | Increase by 6000 per gear | Increase by 0.5% per gear | Increase by 0.5% per gear | The highest leverage ratio that can be opened corresponding to the gear| After the conversion is completed, the platform may adjust the gradient level of the contract based on market liquidity conditions. Adjustments will not be notified separately. Ouyi will continue to provide you with better products and services! Ouyi team September 24th, 2025