Announcement from Ouyi on Launching SEI (Sei) and 2Z (DoubleZero) Spot Trading This is a general announcement, and the availability of tokens or products may vary by region. Please check the details in the application. Dear Ouyi user: Ouyi is about to launch SEI (Sei) and 2Z (DoubleZero). The specific schedule is as follows: Online Time * SEI, 2Z Open Coin Deposit Time: November 14, 2025 11:00 (UTC+8) *Pre order period: *SEI: 14:00 to 15:00 on November 14, 2025 (UTC+8) *2Z: November 14, 2025 from 4:00 PM to 5:00 PM (UTC+8) *Spot trading opening time: *SEI/USDT: 15:00 on November 14, 2025 (UTC+8) *2Z/USDT: 17:00 on November 14, 2025 (UTC+8) *Open withdrawal time: *SEI: 17:00, November 14, 2025 (UTC+8) *2Z: 19:00, November 14, 2025 (UTC+8) Risk control rules for spot opening Price limit rules: During pre order placement and continuous trading periods, the platform will activate an index based limit mechanism. Index based limit price calculation rules: Stage | Maximum Purchase Limit |Sell order minimum price| Pre order pending | Index × (1+J) | Index × (1-J)| 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 J, 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. Project Introduction: Sei is a high-performance Layer 1 blockchain that extends EVM through parallel execution, enabling faster transaction speeds, lower fees, and seamless deployment of smart contracts. *English full name: Sei *English abbreviation: SEI *Token Network: SEI EVM *Check SEI prices: https://www. ((okx.com))/price/sei-sei DoubleZero is a global fiber optic network designed to provide higher bandwidth and lower latency for high-performance distributed systems and blockchain. *English full name: DoubleZero *English abbreviation: 2Z *Contract address: Solana Chain (J6pQ3FAcJQeWPPGppWRb4nM8jU3wLyYbRrLh7feMfvd) *View 2Z prices: https://www. ((okx.com))/price/doublezero-2z Deposit USDT immediately to prepare for SEI/USDT, 2Z/USDT spot trading: Ouyi will continue to provide you with better products and services! Ouyi team November 14th, 2025