Jiangsu Jiangnan High Fiber Co., Ltd. Stock Trading Abnormal Fluctuation Announcement

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Stock code: 600527 Stock abbreviation: Jiangnan High-Fiber Announcement No.: 2026-001

Jiangsu Jiangnan High-Fiber Co., Ltd.

Announcement of Abnormal Stock Price Movements

The board of directors and all directors of the Company hereby guarantee that the contents of this announcement contain no false statements, misleading representations, or material omissions, and assume legal responsibility for the authenticity, accuracy, and completeness of the contents.

Key Matters to Note:

● The shares of Jiangsu Jiangnan High-Fiber Co., Ltd. (hereinafter referred to as the “Company”) had closing price increases whose cumulative deviation value reached 20% within three consecutive trading days on March 24, 2026, March 25, 2026, and March 26, 2026. In accordance with the relevant provisions of the《Trading Rules of the Shanghai Stock Exchange》，this falls under the circumstance of abnormal stock trading price movements.

● Affected by the situation in the Middle East and international energy prices, the prices of major raw materials and product prices have risen to varying degrees; however, there has been no material change in the Company’s main business, profitability, or product gross margin.

● After conducting an internal self-check and verifying with the Company’s controlling shareholder and actual controller, as of the date of disclosure of this announcement, there are no major matters or material information that should be disclosed but have not been disclosed.

I. Specific Circumstances of Abnormal Stock Trading Price Movements

Within three consecutive trading days, the closing price increase deviation value of the Company’s shares totaled 20% on March 24, 2026, March 25, 2026, and March 26, 2026. In accordance with the relevant provisions of the《Trading Rules of the Shanghai Stock Exchange》，this falls under the circumstance of abnormal stock trading price movements.

II. Related Matters the Company Has Monitored and Verified

(I) Production and operation

After conducting a self-check, the Company’s production and operation are normal. Affected by the situation in the Middle East and international energy prices, the prices of major raw materials and product prices have risen to varying degrees; however, there has been no material change in the Company’s main business, profitability, or product gross margin.

(II) Major matters

After conducting a self-check and, by means of a written inquiry, verifying with the Company’s controlling shareholder and actual controller, as of the date of disclosure of this announcement, neither the Company, nor the Company’s controlling shareholder, nor its actual controller has any major information related to the Company that should be disclosed but has not been disclosed, including but not limited to major asset restructuring, issuance of shares, major transaction-related matters, business restructuring, share repurchases, equity incentives, bankruptcy reorganization, major business cooperation, introduction of strategic investors, and other major matters.

(III) Media reports, market rumors, and hot-concept matters

The Company has not found any media reports or market rumors that could have a material impact on the trading price of the Company’s shares, nor has it been involved in any hot-concept matters.

(IV) Other price-sensitive information

After the Company’s verification, as of the date of disclosure of this announcement, there are no other major matters that affect abnormal fluctuations in the trading price of the Company’s shares, and there is no material information that should be disclosed but has not been disclosed. During the period of the current abnormal stock trading price movement, the Company’s actual controller, controlling shareholder, and the Company’s directors and senior management have not engaged in buying or selling the Company’s shares, and no other major events that could have a significant impact on the Company’s share price have been found.

III. Relevant Risk Warnings

1. Stock trading risks

Within three consecutive trading days on March 24, 2026, March 25, 2026, and March 26, 2026, the cumulative closing price increase deviation value of the Company’s shares reached 20%, which constitutes abnormal stock trading price movements. Investors are kindly requested to pay attention to the risks of trading in the secondary market, make rational decisions, and invest prudently.

2. Business performance risks

In the third quarter of 2025, net profit attributable to shareholders of listed companies was 19,960,911.07 yuan, representing a year-on-year decline of 33.69%. Investors are kindly requested to pay attention to investment risks.

The Company designates the 《Shanghai Securities News》 as its information disclosure newspaper, and designates the website of the Shanghai Stock Exchange (www.sse.com.cn) as its information disclosure website. All information of the Company shall be subject to the relevant announcements published in the designated media above. Investors are kindly requested to make rational investments and pay attention to investment risks.

IV. Statement of the Board of Directors

The board of directors of the Company confirms that the Company has no matters or planning, discussions, intentions, agreements, etc. related to such matters that should be disclosed but have not been disclosed in accordance with provisions such as the《Stock Listing Rules of the Shanghai Stock Exchange》. The board of directors has also not become aware of any information that should be disclosed but has not been disclosed, in accordance with provisions such as the《Stock Listing Rules of the Shanghai Stock Exchange》, that could potentially have a significant impact on the trading prices of the Company’s shares and their derivative securities. There are no matters in the Company’s prior disclosures that require correction or supplementation.

Announcement is hereby given.

Board of Directors of Jiangsu Jiangnan High-Fiber Co., Ltd.

March 27, 2026

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