Since 1998, every product has been insured with PICC and there has been no claim so far. The heating film customized by LG of Korea is used, and the current passing through the unit area is very small when the power is on, and even if the heating film is broken, it will not leak, so the elderly can use it with confidence. In order to meet the physiological needs of Chinese "cool heads and warm feet", the laying density has been changed, forming a "temperature ladder" from top to bottom, which is very in line with the health care needs of the elderly, and is definitely a high-quality choice for parents.