The "4.8m section baked and fired integrated Packaged tunnel Kiln" project in Chengmai, Hainan, designed and constructed by Xi 'an Liyuan, is under smooth construction. The raw materials of this project are local laterite, volcanic ash deposit soil and coal gangue. The designed production capacity is 300,000-400,000 folding bricks. At present, the project has completed the load-bearing structure of the kiln body and the thermal insulation system of the kiln body.