Announcement from Ouyi regarding the extension of Spark USDC on chain coin earning activity Dear Ouyi user: On September 3, 2025 at 4:00 PM (UTC+8), Ouyi will extend the additional SPK token reward activity for Spark USDC, with no subscription limit and a maximum annualized return of 10% (including Spark Protocol base return and 5.5% real-time activity annualized return). Activity Rules *By subscribing to the Spark Protocol on chain earning products in USDC, you can receive corresponding additional SPK rewards. For users who are currently participating in the Spark USDC activity, there is no need to redeem to continue enjoying the activity rewards. Participation rules *Complete identity authentication. *Both Ouyi App and web users can participate in this activity. *Sub accounts are not allowed to participate in this activity. Event Time and Reward Details Activity extension time | Prize pool | Reward currency| September 3, 2025 16:00~October 10, 2025 16:00 (UTC+8) | 4000000 SPK | SPK| User rewards and distribution rules *SPK token reward: Exclusive reward from Ouyi, distributed daily to users' fund accounts during the event period. *Reward calculation method: The SPK rewards that users receive daily will be calculated based on the proportion of their pledged quantity in the total prize pool. The prize pool is evenly distributed on a daily basis, and users can enjoy up to 10% annualized revenue (including Spark protocol basic revenue rate and 5.5% real-time activity annualized revenue rate). How to participate App end: Go to "Explore", select "Earn Coins on Chain", choose USDC and set the source of income as Spark. After entering the subscription quantity, complete the subscription operation. On the web side: Go to "Finance", select "Earn Coins on the Chain", choose USDC and set the source of income as Spark. After entering the subscription quantity, complete the subscription operation. terms and conditions *The Spark USDC event will begin at 4:00 PM (UTC+8) on August 4, 2025 and extend until 4:00 PM (UTC+8) on October 10, 2025 (the "Event Period"). *Participants who enter the activity page and participate in this activity assume that they have read and understood the terms and conditions of this activity. *This activity is only open to the main account, and sub accounts are not allowed to participate in this activity. The income of the sub account is not included in the income of the main account. *Users from certain countries or regions (based on authentication information) may not be able to participate in this activity. Please refer to Article 3 of the Ouyi Risk Disclosure and Disclaimer for details. *For the Spark USDC campaign, your rewards will be distributed daily in the form of SPK to your fund account. Due to reasons deemed necessary by the platform (such as large-scale risk control inspections), the platform has the right to decide on its own to postpone the distribution of rewards. *Ouyi has the right to decide to convert any reward into platform vouchers or USDT of equivalent or lower value. This situation may occur in certain jurisdictions where platform restrictions result in participants being ineligible to receive certain activity rewards, where Ouyi is unable to distribute rewards to participants, or in any situation where Ouyi deems it necessary to convert rewards. The reward will be converted into an equivalent for distribution. *The rewards for this event may include non stablecoins, and the actual quantity distributed will be based on the USDT spot trading price at the time of reward distribution, and converted to the equivalent value in US dollars. *This activity is not intended to provide (i) investment advice or recommendations, (ii) offers, solicitation or inducement to purchase, sell or hold digital assets, or (iii) financial, accounting, legal or tax advice. You should carefully consider whether it is suitable to trade or hold digital assets based on your financial situation and risk tolerance. For your specific situation, please consult your legal/tax/investment professionals. Digital assets (including stablecoins and NFTs) are subject to market volatility, involve high risks, and may depreciate. Historical returns do not represent future performance, and past performance does not predict future outcomes. Ouyi shall not be held responsible for any potential losses. Not all regions offer all products and services, and participation in this event may be restricted or unavailable in some areas. If you have any related questions, please consult your legal, tax, or investment advisor. *Risk Warning: Digital asset prices have high market risk and price volatility. Your investment value may fluctuate and you may lose the investment amount. You are fully responsible for your investment decision, and Ouyi is not liable for any potential losses. Past performance does not constitute a reliable prediction of future performance. You should only invest in products that you are familiar with and understand the risks involved. Before making any investment, you should consider your investment experience, financial situation, investment goals, and risk preferences, and consult an independent financial advisor. This document should not be considered as financial advice. For more details, please refer to the Ouyi Service Terms and Risk Disclosure and Disclaimer. *Please note that the value of the prize may vary with market fluctuations. The value of the prize may increase or decrease between your eligibility to withdraw and the actual withdrawal. The prices of digital assets, including stablecoins, may fluctuate at any time, so the value of your assets may also rise or fall at any time. *All taxes, fees, and other additional expenses related to the collection and use of rewards (including network connection, installation, and/or service fees, etc.) shall be borne by the reward recipient themselves. *During the event, Ouyi will strictly monitor users' trading behavior to prevent any form of cheating or abnormal operations, including but not limited to: registering multiple accounts, using other people's accounts, registering with other people's information, submitting false KYC information, maliciously brushing volume, conducting reverse or wash trades, violating the terms and conditions of the event, violating local trading regulations, or engaging in any behavior involving illegal, fraudulent, or harmful purposes. Once the above situation is discovered, Ouyi has the right to cancel the user's award eligibility. *Ouyi reserves the right to exclude any participant from this event and/or cancel this event without prior notice. *Ouyi reserves the right to modify the rules of this event at any time without prior notice, including but not limited to canceling, extending or terminating this event, modifying the eligibility conditions of participating users, and adjusting the event and reward rules. All participants should comply with these revised terms. If circumstances permit, Ouyi will make every effort to notify relevant significant changes before the modifications take effect. When exercising any discretion under the terms, Ouyi shall do so in a reasonable manner. *Ouyi reserves the right of final interpretation for this event. If you have any questions, please contact the customer service team. *Ouyi is not responsible for errors or omissions in technology, images, layout, or editing. For more information, please visit www.okx.com © 2025 OKX reserves all rights. *If there are any discrepancies between the English version of these terms and conditions and the translated versions in other languages, the English version shall prevail. Ouyi team September 4th, 2025