I went to Fuyang Longmen Ancient Town the day before yesterday. It is said that there is a kind of stone called water-absorbing stone. It is said that soaking in salt water for more than three hours c

I went to Fuyang Longmen Ancient Town the day before yesterday. It is said that there is a kind of stone called water-absorbing stone. It is said that soaking in salt water for more than three hours can keep you warm in winter and cool in summer. Is this true?

Warmth in winter and coolness in summer is a phenomenon. After the water-absorbing stone is soaked in salt water, a large amount of salt will be adsorbed in the water-absorbing stone. In summer, when the weather is humid, the salt will absorb water. The stone is moist and feels cold to the touch. In winter, the air is dry and the stones contain less moisture. In addition, the absorbent stones are porous and slow to conduct heat, so they feel warmer.