máng shān xíng
a form of Yuefu 樂府|乐府 mourning song or elegy
lit. to visit a tomb on Mt Mang
邙
máng
Mt Mang at Luoyang in Henan, with many Han, Wei and Jin dynasty royal tombs
山
shān
mountain; hill (CL:座[zuo4])
行
xíng
(bound form) to walk; to go; to travel