Yaruida ice-fire clean board, also known as cement fiber board, has the advantage of being able to perform 25 cycles test at minus 80° and near Baidu high temperature. The board shall not be cracked or delaminated. Under the test of "ice and fire", it has been reborn from the ashes, showing its superior performance. In this way, the combustion performance test is better than the A-level fire performance indicators, and it is a non-combustible product!