On November 15, the five day 22nd CHINA HITECH FAIR closed in Shenzhen.More than 450,000 viewers
perceive the collision of technology and life up close,which is unprecedented.
As a leader in the f...
SpO₂ is one of the important indicators of physical health. The SpO₂ of a normal healthy person should be kept between 95%-100%. If it is lower than 90%, it has entered the range of hypoxia, and on...