Among the emerald-green mountain ranges, a large open-pit mining area suddenly comes into view. Without the reminder of several orange excavators in the distance and a large production workshop, it would be hard to associate this lush, green and serene environment with the impression of a dusty open-pit quarry.

Cui Zhiwei, the chief manager of this large green open-pit mine, has carefully managed the mine for 7-8 years since its initial construction. The Sanjie Town Mining Area in Lingchuan County launched pilot construction in 2017 and passed acceptance in 2018, specializing in the mining and sales of limestone for construction aggregates. The company's high-quality sand and gravel aggregates are widely favored in real estate, transportation infrastructure, and other sectors. When the Sanjie Town open-pit mine was still in the pilot construction phase in 2017, Yanghua Building Materials boldly purchased two original imported Komatsu ZX-490LCH hydraulic excavators. The orange Hitachi Construction Machinery hydraulic excavators indeed brought good luck to the mine's construction; in hindsight, this procurement decision was highly forward-looking. In the following years, the sand and gravel aggregate market experienced explosive growth, and the ultra-strong performance and stable operation of Hitachi's hydraulic excavators allowed Yanghua Building Materials to firmly grasp business opportunities during this upsurge.

"Hitachi Construction Machinery's hydraulic excavators have provided us with an excellent user experience," said Manager Cui, praising Hitachi's excavators. More than 20 years ago, Yanghua Building Materials first engaged with Hitachi Construction Machinery. The company's senior management purchased the first-generation ZX 200, second-generation ZX 250-3, and other models. Today, these "veteran" Hitachi hydraulic excavators are still in service, contributing to the production operations of the Sanjie Town open-pit mine. It was from then that Hitachi Construction Machinery's hydraulic excavators established a strong positive impression in their minds, consistently serving as a reliable assistant in their business success.

Among the 15 medium-to-large hydraulic excavators currently operating in Yanghua Building Materials' Sanjie Town mining area, most are from Hitachi Construction Machinery, including 4 ZX490 hydraulic excavators, 2 ZX350 hydraulic excavators, and 1 ZX210 hydraulic excavator, with multiple original imported models.

After successively introducing large mining equipment from international renowned brands like Hitachi Construction Machinery, the Sanjie Town mining area has achieved a dual improvement in production capacity and efficiency. Currently, the mine has built 2 large automated crushing systems and 2 automated machine-made sand production lines, with an annual output of 2.1 million tons of high-quality stone 渣 (stone residue), 400,000 tons of stone powder, and 500,000 tons of machine-made sand, with a peak annual production capacity of over 5 million tons of sand and gravel aggregates. In recent years, with continuous investment in production facilities and optimization of tiered mining processes, Yanghua Building Materials—armed with Hitachi Construction Machinery's mining and loading equipment—has established a leading position and influence in the mining industry of Lingchuan County, Guilin City, and even Guangxi Autonomous Region.

Only by keeping pace with the times can one ride the waves of development. As a loyal customer of Hitachi Construction Machinery, Yanghua Building Materials closely follows product technology trends. At the launch of Hitachi's ZX520LCH-6A large hydraulic excavator in 2023—specifically designed for harsh working conditions in open-pit mines, quarries, and other scenarios—Yanghua promptly introduced the model after communicating with Hitachi's sales team and local dealer, Shenzhen Meipeng Machinery Equipment Co., Ltd. (hereinafter referred to as "Shenzhen Meipeng").

Aligning with the development trends of the mining industry and addressing customers' needs are the starting points for Hitachi Construction Machinery's product design and development. In Cui Zhiwei's view, the scaling effect of Guilin's open-pit mines is increasingly evident, and mining and loading equipment is rapidly transitioning from small-tonnage to large-scale models. The launch of the ZX520LCH-6A has provided better options for customers in the mine crushing industry. Additionally, as professional excavator users, Yanghua's management team unanimously believes that compared with previous models and similar products from other brands, the ZX520LCH-6A's numerous improvements and enhancements better meet the high standards and strict requirements of Sanjie Town Mine's production operations. The introduction of the new model has further strengthened Yanghua Building Materials' equipment capabilities, becoming the cornerstone for the next phase of development in the Sanjie Town open-pit mine.

Regarding the performance and features of the ZX520LCH-6A, Mr. Bian Chengchao from Hitachi Construction Machinery (China) Co., Ltd. introduced: The ZX520LCH-6A is equipped with a new high-power 6WG engine and a next-generation HIOSV high-efficiency intelligent hydraulic system, meeting China's Non-Road Mobile Machinery Stage IV emission standards. It delivers more powerful performance, precise control, and faster response. The entire machine—particularly the front working equipment, undercarriage, and cab—has been reinforced for mine crushing scenarios, ensuring continuous, stable, and powerful output during long-term heavy-duty operations. Furthermore, more user-friendly design details fully demonstrate Hitachi's humanistic care, satisfying the increasing demands for operational safety, comfort, and intelligence from current and future operators.