Zhejiang Terasun (浙江泰瑞尊风管) manufactures pre-insulated air-duct panels and fibre-reinforced cement composite boards at Shengzhou. Its TSM cement board holds European Technical Assessment ETA 24/0895, issued in September 2025 by the Italian Technical Assessment Body CSI-ITC against EAD 350142-00-1106, the assessment route for fire protective board, slab and mat products and kits, and the basis for CE marking of the board’s fire performance. It is one of only two mainland Chinese holders of an ETA in a fire-product assessment family. Board is supplied for ductwork encasement, wall and ceiling linings and structural insulated panels.