1: Fire-proof board: requirements for magnesium oxide: white color, high activity (if the outlet board wants to achieve non-halogen return, the activity of magnesium oxide must be guaranteed at more than 60%) for magnesium oxide heating speed is not very high, because the fire-proof board is thin, heat dissipation is faster.

2: Wallboard: Magnesium oxide color requirements are not very high, to content, because the products made should be able to fully combine with magnesium chloride, increase the strength of wallboard, grade lower than the requirements of fireproof board.

3: Greenhouse bracket: Magnesium oxide is relatively high, because the finished products of greenhouse bracket should have flexibility, strength, wind load, and must not return brine (if the salt water from the finished products drips into the farmland, it will burn the seedlings).

4: Composite air duct: Requirements are not too high, mainly the whiteness and strength of magnesium oxide.