Announcement from Ouyi on Rebase Execution for OPENAIUSDT and ANTHROPICUSDT Pre IPO Contracts Dear Ouyi users, in order to optimize the trading experience, Ouyi will execute Rebase on OPENAIUSDT and ANTHROPICUSDT Pre IPO contracts from 15:00 to 16:00 (UTC+8) on June 30, 2026. The current estimated total share capital is 1 billion, and after Rebase, the new estimated total share capital will become 10 billion. This adjustment will proportionally lower the marked price and simultaneously proportionally increase your holdings and pending orders. What is RebaseRebase? Rebase is a one-time proportional adjustment operation of contract parameters, and its core design principle is value neutrality - your position value and account equity remain consistent before and after Rebase. Important note: This Rebase is not related to the actual share capital of OpenAI and Anthropic. After the relevant companies officially submit their S-1 prospectus to the US Securities and Exchange Commission (SEC) and disclose their actual total share capital, Ouyi will execute another Rebase based on actual share capital (making one contract correspond to one share), which will be announced separately at that time. Please refer to the Pre IPO perpetual contract product documentation for the complete mechanism, execution process, and examples of Rebase. Start time of Rebase: June 30, 2026 15:00 (UTC+8) Duration of Rebase execution: Approximately 5 minutes Post only phase: Enter after Rebase is completed; The duration is determined by the liquidity situation of the Ouyi market, and after confirmation, normal trading will be manually resumed. The adjustment ratio for this Rebase is an active adjustment by the platform, and the adjustment ratio for each contract is as follows: Contract adjustment ratio. The adjustment start time is OPENAIUSDT10, June 30, 2026 at 15:00 (UTC+8) and ANTHROPICUSDT10, June 30, 2026 at 16:00 (UTC+8). Rebase execution impact: Changes in positions and pending orders. Rebase will adjust your positions, pending orders, and prices proportionally according to the adjustment ratio to ensure that the value of your positions and account equity remain consistent before and after. The specific rules are as follows: Project adjustment rules: Position quantity x ratio marked price ÷ ratio number of unexecuted limit orders x ratio, price ÷ ratio take profit stop loss (including moving take profit stop loss, etc.) revoked, unrealized gains and losses not retained settled as realized gains and losses through Rebase, and included in your account balance. Position value and account equity remain unchanged (only minor differences due to rounding). Example: According to ratio=10. Assuming that you hold 100 OPENAIUSDT long positions before Rebase, with a marked price of 1369.62 USDT during Rebase; And there is one unexecuted limit buy order: 10 orders @ 1365.00 USDT. After Rebase: Before and after Rebase (ratio=10), the number of open positions is 100. 100 x 10=1000. The marked price is 1369.62 USDT1369.62 ÷ 10=136.962, rounded to 136.96 USDT based on the minimum change price of 0.01. The value of the open position is 136962 USDT ≈ 136960 USDT (due to rounding, there is a slight difference of about 2 USDT). 10 limit orders @ 1365.00 USDT. The number of open positions is 10 x 10=100; Price 1365.00 ÷ 10=136.50 USDT. Service affects Rebase execution for approximately 5 minutes. Orders, changes, and cancellations will be suspended. Post only stage (duration determined by market liquidity of Eurovision): Only Post only orders can be placed or changed; Other order types (market order, IOC, FOK, regular limit order, take profit stop loss, planned order) cannot be placed or changed, but can be cancelled. Your take profit and stop loss orders (including mobile take profit and stop loss orders, etc.) in this contract will be cancelled and not retained after the Rebase trading is stopped. After the trading resumes, please reset the take profit and stop loss based on the adjusted marker price and position quantity. The running strategy order (Bot) will be stopped; The planned commission and tracking commission will be revoked. Please recreate as needed after Rebase is completed. Risk warning: Rebase involves proportional adjustment of position quantity, pending order price, and quantity. Please control your position reasonably before Rebase, and confirm your position and pending status promptly after Rebase is completed. We apologize for any inconvenience caused to you. Ouyi will continue to provide you with better products and services! Ouyi Team June 25th, 2026