Changzhou Langbo Sealing Technology Co., Ltd. Announcement on the Redemption of Cash Management Using Part of Idle Raised Funds Upon Maturity

MaticHoleFiller · 2026-04-02T02:03:42+00:00

Changzhou Langbo Technology announced that it has conducted cash management with idle raised funds and has redeemed them upon maturity, recovering 5 million yuan of principal and nearly 19,000 yuan in earnings. During the same period, the utilized amount reached 45 million yuan, which did not exceed the authorized limit, and there were no overdue situations.

MaticHoleFiller

2026-04-02 02:03:42

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Stock Code: 603655 Stock Abbreviation: Langbo Technology Announcement No.: 2026-004

Changzhou Langbo Sealing Technology Co., Ltd.

Announcement on the Expiration and Redemption of Cash Management of Some Temporarily Idle Proceeds

The Board of Directors of the Company and all its directors hereby guarantee that this announcement contains no false records, misleading statements, or material omissions, and assume legal responsibility for the truthfulness, accuracy, and completeness of the contents of this announcement.

Changzhou Langbo Sealing Technology Co., Ltd. (hereinafter referred to as the “Company”) held the 2nd meeting of the 4th session of the Board of Directors and the 2nd meeting of the 4th session of the Board of Supervisors on April 27, 2025. The “Proposal on Using Some Temporarily Idle Proceeds for Cash Management” was considered and approved. It was agreed that, while ensuring that the construction of the proceeds projects is not affected and that the use of the proceeds is not changed, the Company may use temporarily idle proceeds of no more than RMB 50.00 million for cash management. The usage period shall be from the date on which this Board meeting approves the proposal until the date on which the next annual Board meeting is held; within the above usage period and额度范围, it may be used on a rolling basis. The Company’s Board of Supervisors and the sponsor have issued clear consent opinions on this matter. For details, please refer to the “Announcement on the Company’s Use of Some Temporarily Idle Proceeds for Cash Management” (Announcement No.: 2025-017) disclosed by the Company on April 29, 2025 on the website of the Shanghai Stock Exchange.

At present, part of the Company’s temporarily idle proceeds used for cash management has reached maturity and been redeemed. The relevant matters are hereby announced as follows:

I. Details of the Expiration and Redemption of Cash Management Using Temporarily Idle Proceeds in This Round

On January 6, 2026, the Company used temporarily idle proceeds of RMB 5.00 million to purchase a cash management product issued by the Jintan Sub-branch of Changzhou Branch of China Merchants Bank.

The above wealth management product has now matured and been redeemed. The principal of RMB 5.00 million was recovered, and investment returns of RMB 18,760.27 were obtained.

Unit: RMB 10,000

■

II. The Company’s Use of Temporarily Idle Proceeds for Cash Management in the Past Twelve Months

Unit: RMB 10,000

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As of the date of disclosure of this announcement, the wealth management额度 used by the Company totals RMB 45.00 million. In the past 12 months, the Company’s highest daily balance and the usage period for cash management using temporarily idle proceeds have both not exceeded the authorized scope, and there are no cases of failure to recover amounts due.

This is hereby announced.

Board of Directors of Changzhou Langbo Sealing Technology Co., Ltd.

April 1, 2026

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