To all employees, partners, and valued clients:

As the International Labor Day approaches, Wuxi High Mountain Hi-tech Development Co., Ltd. extends our highest professional respects to all colleagues working across the international trade and supply chain sectors. We also express our sincere gratitude to our partners and clients for their long-standing trust and support.

In accordance with national regulations for 2026 and considering our operational requirements as a global chemical service provider, our holiday schedule is as follows:

I. Holiday and Adjustment Schedule

• Holiday Period: Friday, May 1, 2026, to Tuesday, May 5, 2026 (5 days in total).

• Work Adjustment: Saturday, May 9, 2026, will be a regular working day.

II. Business and Logistics Notice

Given the current pre-holiday consolidation and volatility in the domestic chlor-alkali and related chemical industrial chains (such as Liquid Caustic Soda, PVC, and Flake Caustic Soda), please take note of the following to ensure continuity of your operations:

• Logistics Alert: During the holiday, regional restrictions on hazardous chemical transport vehicles may lead to restricted logistics capacity and potential delivery delays.

• Order Coordination: For partners with essential requirements for core products—including PVC Paste Resin, Chloroacetic Acid (MCAA), Rongalite, and Thiourea—please confirm inventory and shipping schedules with your account manager before the holiday.

• Emergency Contact: While our offices are closed, our official website (www.wxhmchem.com) remains operational. For urgent business inquiries, please contact our service hotline: Mr. Fan | +86 13382223993.

III. Internal Administrative Requirements

• Safety Inspection: All departments must conduct a comprehensive safety self-check before the holiday to ensure all power, water, windows, and doors are secured.

• Availability: Key personnel in business and supply chain roles are requested to remain reachable via mobile to respond to any urgent global client inquiries or emergencies.

The steady growth of Wuxi High Mountain is built upon the wisdom and hard work of every "HM Artisan" in areas such as global supply chain integration and the pursuit of international pricing influence for PVC Paste Resin. We wish all colleagues and partners a safe, healthy, and restful Labor Day.

Wuxi High Mountain Hi-tech Development Co., Ltd.

April 30, 2026