The United States and China sparred over trade issues Friday but promised to keep lines of communication open as Beijing’s commerce minister paid a rare visit after a period of soaring tensions. China recently restricted purchases from US chip giant Micron, citing security risks. The move was widely interpreted as retaliation after President Joe Biden imposed a sweeping ban on China’s access to US advanced semiconductors, fearing that Beijing will put them to military use and dominate the global market for emerging technologies. Is US afraid of China rising power ?