Company Q&A | Sundar Membrane: The standard delivery cycle for lithium extraction from brine lake projects is 1–2 years.

Gelonghui, May 21 — An investor asked Sandem Membrane on an interactive platform: What is the current order value and delivery timeline for your lithium extraction from brine lake business? What proportion does this business account for within your industrial separation segment? What are the company’s core technological advantages in the field of lithium extraction from brine lakes? Sandem Membrane responded that the standard delivery cycle for brine lake lithium extraction projects is typically 1–2 years, subject to slight variations depending on on-site progress. The company’s core competitive advantage in this field primarily lies in its integrated process package capabilities and proprietary equipment technology. Sandem possesses integrated process package technologies tailored for different types of brine lake feedstocks and has developed continuous moving-bed adsorption systems.

Gelonghui FinanceMay 21 16:55

Company Q&A | Sinada Membrane: From a technical perspective, the company's ultrafiltration and reverse osmosis membrane products can be applied to cooling circulating water treatment in data centers.

Gelonghui, May 19 | An investor asked Sanda Membrane on an interactive platform: "Could you clarify whether the company’s ultrafiltration/reverse osmosis membrane products are technically capable of treating data center cooling circulating water (e.g., for softening, scale removal, and disinfection)? Does the company have a team evaluating the feasibility of this application?" Sanda Membrane replied that, from a technical standpoint, its ultrafiltration and reverse osmosis membrane products can be applied to the treatment of data center cooling circulating water.

Gelonghui FinanceMay 19 17:18

Q&A with the Company | Sanda Membrane: The Jilin Meihhekou production base has not yet commenced operations and will require some additional time to reach full production capacity.

On May 18, Gelonghui reported that an investor asked Sanda Membrane on an interactive platform: Has your Jilin production base started operations? When will it reach full capacity, and are its sales guaranteed? Sanda Membrane replied that its Meihhekou base in Jilin has not yet commenced operations and will require additional time to reach full production. Regarding sales, the company’s management will make every effort to ensure performance.

Gelonghui FinanceMay 18 17:21

Sanda Membrane Technology (688101.SH): Shareholder Qingyuan China plans to reduce its holdings by no more than 9.9604 million shares of the company.

Gelonghui, May 13th: Sunda Membrane Technology (688101.SH) announced that the company's shareholder, Qingyuan China, plans to reduce its holdings in the company through centralized bidding and block trading. The total number of shares to be reduced will not exceed 9,960,400 shares, representing a total reduction of no more than 3.00% of the company's total share capital. The reduction period will take place within three months after 15 trading days from the date of this announcement. Specifically: for reductions through centralized bidding, the total number of shares to be reduced will not exceed 3,320,120 shares, accounting for no more than 1.00% of the company’s total share capital; for reductions via block trading, the total

Gelonghui FinanceMay 13 18:03

Q&A with the Company | Sanda Membrane: The company is currently not involved in the AI liquid cooling filtration market business.

On May 12, Gelonghui reported that an investor asked Sanda Membrane on an interactive platform: Is your company entering the AI liquid cooling filtration market? Sanda Membrane replied that the company is currently not involved in this business.

Gelonghui FinanceMay 12 15:40

Sanda Membrane Technology (688101.SH): Shareholder Clear Source China has completed the reduction of its 3% stake in the company.

Gelonghui reported on May 8 that Sanda Membrane Technology (688101.SH) announced that the company had received a letter titled 'Notification of the Completion of the Share Reduction Plan' from shareholder Qingyuan China on May 7, 2026. As of the date of this announcement, shareholder Qingyuan China has reduced its holdings in the company by 9.9604 million shares, representing 3% of the company's total share capital, through centralized bidding and block trading. The share reduction plan has been fully implemented.

Gelonghui FinanceMay 8 16:58