The 44-year-old Lee junior was promoted to vice chairman from president and chief operating officer (COO) at Samsung Electronics, the main force of Samsung Group and the world's No.1 maker of memory chips, flat screens and smartphones, reported Xinhua. "Lee has made invaluable contributions to the unprecedented growth of Samsung's smartphone and TV businesses. Lee also solidified Samsung's unmatched leadership in the global semiconductor and display markets, and spearheaded Samsung's rapid expansion from the field. Read more technology news here: http://tinyurl.com/csefu7p