It depends on whether you like research or not//1。在公司能做到高位的，通常都在美国有过硕士，博士的经验 Don't think it's true. //2。以本地的学历,中国人的身份，没有美国的学历很难收到提拔 Somewhat true, but generally I have not seen Chinese occupying high positions in Singapore. So it is unclear whether you'll be promoted even with US degree. //3。我念完博士还年轻，进公司做几年科研完全有可能转去其他部门 Everything is possible, but why do PhD in the first place if you want to jump to non-R&D dept?