Recently, good news came from the Yier Technology project site at Chifeng Yubang Mining in Inner Mongolia. Thanks to its robust equipment and attentive end-to-end after-sales service, Yier Technology received a letter of gratitude and a banner specially presented by the Henan Sanyi Mine Construction Engineering Co., Ltd. project team stationed at the Yubang Mining site. On-site after-sales engineer Guo Yi earned high praise from the entire mining project team for his professional and efficient technical support.
In this inclined blind raisebore project undertaken by Yubang Mining, our company’s independently developed ATM-1000L cutting Raise borer Machine was employed, requiring the successful overcoming of challenging underground geological conditions at a 70° incline.
The project successfully achieved precise breakthroughs for two inclined blind shafts, with depths of 20 meters and 16 meters, respectively. The overall drilling efficiency remained consistently stable at 30–40 minutes per meter, while operations were conducted safely and smoothly, meeting all borehole‑alignment specifications. All construction milestones were completed efficiently, paving the way for subsequent mining activities by establishing a critical access route.

The complex underground geological conditions and the tight project schedule are the two major challenges of this construction project. On-site after-sales engineer Guo Yi has been stationed at the front line throughout, providing meticulous technical expertise and a rigorous, responsible work ethic to closely monitor every stage of the construction process. Faced with various technical difficulties on site, he swiftly and accurately identifies the core issues, drawing on his deep theoretical knowledge and extensive hands-on experience in mining to deliver practical, implementable optimization solutions. He personally oversees the entire implementation process, fully embodying the customer-first service philosophy. His efficient, professional technical support and patient, attentive communication not only ensure that key project milestones are completed on time and that the expected construction goals are successfully achieved, but also earn him the full trust and heartfelt praise of all personnel involved in the Henan Sanyi project. In their letter of thanks, they explicitly stated that Engineer Guo Yi’s outstanding service is the most direct reflection of Yier Technology’s robust technical capabilities and excellent corporate culture.

The Honghe Sanyi Chifeng Project Department at Yubang Mining sent a letter expressing sincere gratitude to our company and Engineer Guo Yi, while also presenting a specially made banner to commend Yier Technology’s superior equipment quality and excellent after-sales service. In the letter, the client noted that highly skilled technical talent is the cornerstone for an enterprise to establish itself in the industry and earn market trust, and expressed hope for further deepening two-way cooperation in the future, working together to unlock more win-win opportunities in the mining sector.

This dual honor of a banner and a letter of appreciation represents the customer’s dual recognition of Yier Technology’s product performance and after-sales service system.

The company calls on all after-sales service personnel to take Engineer Guo Yi as a role model, remain committed to the original mission of professional service, and dedicate themselves to frontline technical support. By providing reliable equipment and high‑quality service, they will continue to ensure the smooth operation of major mining projects nationwide, earning greater customer recognition and industry accolades through their expertise.

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