[来龙去脉 / 來龍去脈, lái lóng qù màiㄌㄞˊ ㄌㄨㄥˊ ㄑㄩˋ ㄇㄞˋ] lit. a mountain is like a dragon, with a connecting pulse throughout (fengshui term); the whys and wherefores (of a case); where sth comes from and where it is going#29885
[人去楼空 / 人去樓空, rén qù lóu kōngㄖㄣˊ ㄑㄩˋ ㄌㄡˊ ㄎㄨㄥ] people are gone, the tower is empty; cf Yellow Crane Tower 黄鹤楼, Tang poem by Cui Hao 崔顥|崔颢, with theme the past will never return; nostalgia for old friends, See Also: 黄鹤楼, 崔顥, 崔颢#42694