Director of the Song Dynasty says, before floor, charcoal of a bamboo can be spread on the ground, if choose cheap activated carbon, OK and proper store is a bit larger, the effect is same.

• 宋主任说，在铺地板前，地面上可以铺一层竹炭，假如选择便宜的活性炭，可以适当铺厚一点，效果是一样的。