Core Viewpoint - Xizi Clean Energy (002534.SZ) has successfully entered the international market with its shield tunneling machine products, which were developed in collaboration with China Railway Construction Heavy Industry in 2018 for the Jinyi East Intercity Rail project [1] Group 1 - The company has manufactured a composite tunneling machine in partnership with China Railway Construction Heavy Industry [1] - The shield tunneling machine products have been exported to Thailand and Singapore, indicating successful penetration into international markets [1]