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Address: Social responsibility
After-sales service
Dear User:
Hello!
To build a renowned brand, enhance our company’s visibility, and establish a strong corporate image, our company, guided by the spirit of “pursuing high quality in everything and prioritizing customer satisfaction,” solemnly promises you, based on the principles of “the most competitive prices, the most attentive service, and the most reliable product quality”:
Product Quality Commitment:
1. Organize production strictly in accordance with the product specifications, models, quantities, technical specifications, and relevant national and industry standards as outlined in the contract documents.
2. Ensure that the delivered goods are brand-new and unused.
3. Conduct strict factory inspections to ensure a 100% pass rate for products leaving the factory.
4. For any issues that arise after the product leaves the factory, our company will actively assist in resolving them.

Product Price Guarantee:
1. To ensure the high reliability and advanced features of our products, we select only high-quality, well-known brands—both domestic and international—for all components and materials.
2. Under equal competitive conditions, our company is committed to offering you the most favorable price without compromising the product’s technical performance or altering its components.
Delivery Time Commitment:
1. Product delivery time: We will endeavor to meet the customer’s requirements as closely as possible. If there are special requirements or a need for earlier completion, our company can specially organize production and installation efforts to do our utmost to satisfy the customer’s needs.
2. Upon product delivery, our company will provide the user with the following documents: ① Product manual ② Technical maintenance and repair manual ③ General installation drawing ④ List of wear parts and spare parts.
After-sales service commitment:
1. Service Principle: Customer satisfaction, prompt and thorough responses to all inquiries, and attention to every single detail.
2. Service Philosophy: We promise confidence—until you’re completely satisfied. Thank you for choosing “Longzhida”; choosing us means choosing satisfaction.
3. Service Objective: Achieve customer satisfaction through service quality.
Return and Exchange Guarantee:
1. Returned or exchanged products must come with the product’s complete outer packaging, accessories, instruction manual, warranty card, invoice, delivery note, and a description of the reason for the return or exchange.
2. If quality issues arise under normal usage conditions, please contact our company promptly within the warranty period to ensure timely repair and replacement services.
Longzhida Company Successfully Hosted the Victory Parade Commemorating the War of Resistance.
Longzhida Company Successfully Hosted the Victory Parade Commemorating the War of Resistance.
Today is a day that every Chinese person should solemnly remember—the 80th anniversary of the victory of the Chinese People’s War of Resistance Against Japanese Aggression and the World Anti-Fascist War.
On July 2, Chengde Longzhida Company held a meeting with the Sino-German Institute. After thorough discussions between the two sides, Mr. Bai, General Manager of Longzhida Company, and the faculty team from the Sino-German Institute reached a consensus: Longzhida Company officially entrusted the Sino-German Institute to carry out the design and R&D work for a new type of ultrasonic water meter.
On May 30, Longzhida Company successfully held an exceptionally meaningful event titled “Welcoming the Eighth ‘National Science and Technology Workers’ Day’: Promoting the Spirit of Scientists.”