幕天席地mu tian xi di
have the sky as one’s tent and the earth as one’s mat—❶take one’s ease out in the open air
❷have great breadth of view
幕天席地mù tiān xí dì
幕：布幕。把天当作幕，把地当作席。原形容胸襟开阔，也形容野外生活不畏艰险。a picnic party in the open, with the blue sky over one’s head and the grass land under one’s feet, sleep on the ground in the open air