[掌握, zhǎng wòㄓㄤˇ ㄨㄛˋ] to grasp (often fig.); to master; to know well; to understand sth well and know how to use it; fluency; to control; to seize (initiative, opportunity, destiny)#1674
[运筹帷幄, yùn chóu wéi wòㄩㄣˋ ㄔㄡˊ ㄨㄟˊ ㄨㄛˋ] lit. to devise battle plan in a tent (成语 saw); fig. planning strategies; cf Liu Bang 劉邦|刘邦 in his tent trusts his general a thousand miles away to make better decisions, See Also: 成语, 劉邦, 刘邦#39641