Shenzhen Dapu Microelectronics Co., Ltd. First Public Offering of Shares and Listing on the Growth Enterprise Market Announcement

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Sponsor (Lead Underwriter): Guotai Haitong Securities Co., Ltd.

Shenzhen Dapu Microelectronics Co., Ltd. (hereinafter referred to as the “Issuer,” “Dapu Micro,” or “Company”)’s application for initial public offering and listing on the Growth Enterprise Market (hereinafter referred to as “this issuance”) has been approved by the Shenzhen Stock Exchange (hereinafter referred to as “SZSE”) Listing Review Committee and has been registered with the China Securities Regulatory Commission (hereinafter referred to as “CSRC”) (Approval No. ZJH [2026] 97). Guotai Haitong Securities Co., Ltd. (hereinafter referred to as “Guotai Haitong,” “Sponsor,” or “Lead Underwriter”) acts as the sponsor (lead underwriter). The “Prospectus for the Initial Public Offering and Listing on the Growth Enterprise Market of Shenzhen Dapu Microelectronics Co., Ltd.” (hereinafter “Prospectus”) and its attachments are disclosed on the CSRC-designated website (CNINFO, www.cninfo.com.cn; China Securities Journal, www.cs.com.cn; China Securities Network, www.cnstock.com; Securities Times, www.stcn.com; Securities Daily, www.zqrb.cn); also available at the issuer’s, SZSE’s, and sponsor’s (lead underwriter’s) addresses for public reference.

Investors are kindly advised to pay close attention to the issuance method, online and offline subscription and payment, the clawback mechanism, suspension of issuance, and handling of abandoned shares, and to carefully read the “Preliminary Inquiry and Promotion Announcement for the Initial Public Offering and Listing on the Growth Enterprise Market of Shenzhen Dapu Microelectronics Co., Ltd.” published today (hereinafter “Preliminary Inquiry and Promotion Announcement”). The specific contents are as follows:

1. The offline subscription date and online subscription date are both April 3, 2026 (T day). Offline subscription hours are from 9:30 to 15:00; online subscription hours are from 9:15 to 11:30 and 13:00 to 15:00. Investors are not required to pay subscription funds when subscribing online or offline on April 3, 2026 (T day).

2. All offline investors intending to participate in the preliminary inquiry and meeting relevant investor conditions must, before 12:00 noon on March 27, 2026 (T-5 days), submit verification materials and asset proof via Guotai Haitong’s reporting system (website: https://ipoinvestor.gtht.com).

3. This issuance adopts a combined approach of targeted placement to strategic investors (hereinafter “Strategic Placement”), offline inquiry and placement to qualified investors (hereinafter “Offline Issuance”), and online pricing to the general public investors holding non-restricted A-shares and non-restricted depositary receipts in the Shenzhen market (hereinafter “Online Issuance”).

The strategic placement, preliminary inquiry, and online and offline issuance are organized and implemented by the sponsor (lead underwriter). Preliminary inquiry and offline issuance are conducted via the SZSE’s offline issuance electronic platform (https://eipo.szzse.cn) and the China Clearing Shenzhen Branch registration and settlement platform; online issuance is conducted through the SZSE trading system. Please read the “Shenzhen Market IPO Online Issuance Implementation Rules” (SZSE Announcement [2018] 279) carefully before participating.

The strategic placement involves the sponsor’s subsidiaries, senior management, core employees participating in the special asset management plan for strategic placement, and other investors involved in the strategic placement.

The issuer and sponsor (lead underwriter) will disclose the total number of shares, subscription quantities, proportion of shares allocated in the strategic placement, and holding period in the “Issuance Announcement for the IPO and Listing on the Growth Enterprise Market of Shenzhen Dapu Microelectronics Co., Ltd.” (hereinafter “Issuance Announcement”).

4. The issuer and sponsor (lead underwriter) will determine the issuance price directly through offline preliminary inquiry; no cumulative bidding inquiry will be conducted offline.

5. Offline subscription targets: registered securities firms, fund management companies, futures companies, trust companies, wealth management companies, financial companies, insurance companies, qualified offshore investors, and private fund managers meeting certain conditions.

6. Preliminary inquiry: scheduled for March 30, 2026 (T-4 days), from 9:30 to 15:00. During this period, qualified offline investors can submit their bid prices and proposed subscription quantities via the SZSE’s offline electronic platform.

One working day before offline inquiry (March 27, 2026, T-5 days), from 8:30 to 9:30 on the inquiry day, offline investors must submit their pricing basis and related supporting documents via the platform. Failure to do so disqualifies participation.

Investors participating in the inquiry can submit different bid prices for multiple allocation targets managed by them, with a maximum of three different bids per investor. The highest bid cannot exceed 120% of the lowest bid. Bids must include per-share price and proposed quantity; each allocation target can only have one bid. Once submitted, bids cannot be withdrawn.

If adjustments are needed for bids due to special reasons, the internal approval process must be re-performed, and explanations, reasons, and calculations must be documented and archived.

The minimum bid unit is 0.01 yuan. During preliminary inquiry, the minimum proposed subscription quantity per offline target is 1 million shares, with increments of 100,000 shares. Proposed quantities exceeding 1 million shares must be in multiples of 100,000 shares, and each target’s bid cannot exceed 14 million shares.

Each target’s maximum bid is 14 million shares, approximately 50.15% of the initial offline issuance. Investors and their managed targets must strictly follow industry regulations, strengthen risk control and compliance, and prudently determine bid prices and quantities within their asset scale. When participating in preliminary inquiry, pay particular attention to whether the total bid amount (price times quantity) exceeds the lower of the total assets reported on February 28, 2026, or the last natural day of the month prior to the prospectus publication, for the investor and its targets.

Participants must submit asset proof materials via Guotai Haitong’s IPO offline investor reporting system before 12:00 noon on March 27, 2026. Non-compliance or incomplete submission may result in disqualification or invalid bids, which will be disclosed in the issuance announcement. Violations will be subject to legal liabilities.

Special Tip 1: To promote prudent bidding, SZSE has added a verification function for pricing basis on the electronic platform. Investors should operate as follows:

Before the inquiry begins (March 27, 2026, T-5 days), from 8:30 to 9:30, submit pricing basis and suggested price range via the platform. Bids without prior submission are invalid. Internal approval must be completed before submission.

Bids should follow the recommendations in internal research reports and not modify or exceed the suggested price range.

Special Tip 2: Investors must truthfully submit asset scale reports and supporting documents reflecting the latest month-end (February 28, 2026) total assets of the targets, matching the assets reported to the sponsor. Proposed subscription amounts cannot exceed the total assets in these reports. For targets less than one month old, the asset value is based on the fifth trading day before the inquiry (March 23, 2026). Any inconsistency will be borne by the investor.

Special Tip 3: To facilitate asset verification, investors must truthfully fill in the total assets of the targets for the last month-end in the platform, consistent with submitted reports. For targets less than one month old, the value on March 23, 2026, applies.

Investors must comply with industry regulations and asset scale limits when submitting bids. Violations may lead to bid invalidation.

7. Post-inquiry, the issuer and sponsor will rank bids from high to low, remove the top portion of bids (up to 3% of total bids after removal), and determine the final price, quantity, and eligible investors based on comprehensive evaluation, including valuation and market conditions. The number of valid bids must be at least 10.

Valid bids are those not below the final determined price, not among the highest bids to be removed, and meeting other pre-announced conditions. Only valid bids participate in the final allocation.

The sponsor has engaged Shanghai Jintiancheng Law Firm for real-time oversight and will review the qualification, inquiry, pricing, allocation, fund transfer, and disclosure processes for compliance.

8. Investors should note that if the final issuance price exceeds the median and weighted average of bids after removing the top bids, or if the price-to-earnings ratio exceeds the industry average, or if the issuer is not yet profitable, a special risk warning will be issued before online subscription, explaining the pricing rationale and risks.

9. Lock-up period arrangements: The online issued shares will have no restrictions and can be traded immediately after listing. Offline shares will be subject to a 6-month lock-up period for 40% of the allocated shares, starting from the listing date; the remaining 60% are unrestricted.

Investors participating in initial inquiry and subscription are deemed to accept these lock-up arrangements.

Details of strategic placement lock-up are in the “Preliminary Inquiry and Promotion Announcement.”

10. Market value requirements:

Offline investors: As of two trading days before the inquiry (March 26, 2026, T-6 days), the average daily market value of Shenzhen non-restricted A-shares and depositary receipts held over the past 20 trading days must be at least 10 million yuan for certain funds, and at least 60 million yuan for other qualified investors.

Online investors: Must hold a Shenzhen stock account with trading rights on the Growth Enterprise Market and meet the “Implementation Measures for the Suitability Management of GEM Investors (2020 Revision).” Their average daily market value over the past 20 trading days before April 1, 2026, must be at least 10,000 yuan in non-restricted A-shares and depositary receipts to participate.

11. No subscription funds are required for online or offline subscription on April 3, 2026, from 9:15 to 15:00.

12. Investors should independently express their subscription intentions; proxy entrustment is not allowed.

13. The issuance’s clawback mechanism: After subscriptions close, the issuer and sponsor will decide whether to activate the mechanism based on subscription results, to adjust the scale of online and offline issuance. Details are in the “Preliminary Inquiry and Promotion Announcement.”

14. Payment and handling of abandoned shares: Offline investors must pay the final subscription amount by 16:00 on April 8, 2026, based on the final price and allocation. Funds must be received by then. If multiple shares are allocated, payment must be made separately for each; merging payments may cause failure.

Online investors must ensure their accounts have sufficient funds by the end of April 8, 2026, or they will be deemed to have waived their subscription, with legal consequences.

Abandoned shares will be underwritten by the sponsor.

15. Suspension of issuance: If, after deducting strategic placement, the total subscription amount is less than 70% of the issuance, the issuer and sponsor will suspend the issuance and disclose reasons and follow-up plans. Details are in the “Preliminary Inquiry and Promotion Announcement.”

16. Default liabilities: Investors who submit valid bids but fail to subscribe or pay on time will be considered in breach and liable for breach. The sponsor will report breaches to the CSRC. Repeated violations may result in restrictions on participation in future offerings.

17. Post-issuance, the company plans to list on the Growth Enterprise Market, which involves higher investment risks, including high R&D costs, operational risks, unstable performance, and delisting risks. Investors should understand these risks and the disclosures in the Prospectus, and make cautious decisions.

Investors must understand relevant laws and regulations, review this announcement carefully, and ensure their participation complies with legal and regulatory requirements. Once bids are submitted, the sponsor will consider the investor’s commitment to legality; any violations are the investor’s responsibility.

18. The issuer and sponsor (lead underwriter) confirm that as of this announcement, no major issues affect the launch of the issuance.

Overview of this stock issuance

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Issuer: Shenzhen Dapu Microelectronics Co., Ltd.

Sponsor (Lead Underwriter): Guotai Haitong Securities Co., Ltd.

March 26, 2026