What is a negative ion eco-board? Where is the negative ion eco-board?

Negative ion eco-board is an eco-board made by adding negative ion promoting materials in the process of producing viscose from plates. Negative ion promoting materials can continuously release negative oxygen ions under natural conditions, and air negative ions are called "air growth factors". Negative ions can neutralize dust substances and make them settle, thus playing the role of purifying air, in addition to purifying aldehydes and resisting bacteria. On-line and the negative ion board of the Millennium ship are introduced, hoping to help the landlord.