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Ventilation and other methods create the required air environment for tunnel and underground construction projects. Different tunnels and underground works have their ventilation requirements. Due to the geographical and climatic conditions, building structure, and internal production processes, the ventilation technology measures should differ (see underground space development and utilization).

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We've worked with China Railway 9th/10th Bureau, China Railway Tunnel Bureau, Beijing Municipal, and other government organizations for many years since its establishment. Tunnel projects such as Longdongbao Airport Ssangyong Interchange, Hailongtun Tunnel, Pagoda Tunnel, and Wangcheng Avenue under the tunnel,etc