Abstract: A health pillow includes a supine portion and two side-lying portions symmetrically arranged on the two opposite sides of the supine portion. Each of the side-lying portions has a front surface. The supine portion has a supporting protrusion extending beyond the two front surfaces, and the supporting protrusion has a flat surface extending outwardly and away from the two front surfaces. Whereby, the health pillow can help people to get better sleep quality.

Abstract: A health pillow includes a supine portion and two side-lying portions symmetrically arranged on both sides of the supine portion. Each of the side-lying portions has a front surface. The supine portion has a supporting projection protruding beyond the two front surfaces, and the supporting projection has a flat surface extending outwardly away from the two front surfaces. Whereby, the health pillow can help people to get better sleep quality.

Abstract: A power purchasing system, a method thereof and a computer readable storage medium are provided. The power purchasing system includes a storage element and a processor. The storage element stores a demanded quantity (indicating the total power to be saved), a projected quantity and an acceptable purchase price of each user. The processor calculates a supply quantity (indicating the power needed to be saved) of each user and a rebate corresponding to the supply quantity according to a present purchase price, a present demanded quantity, a power saving efficiency of each user, a present projected quantity and acceptable purchase price. Accordingly, the user acquires a reasonable rebate by a fair auction and the power generation side saves the needed power by a fair auction similarly.