梯山航海

Explanation: Mountain navigation. Analogy trek through dangerous journey far. 　　Usage: Joint type; as predicate; analogy to travel long distances 　　Source: "Song Shuming Ji Di": "The sun and the moon photos, Ladder Hill Navigation; by both wind and rain, cutting attack with a high tariff." Thesaurus:  make light of travelling a thousand li, make light of travelling a thousand li, Bashan ford, make nothing of hardships, climb over the hills, Bashan Crossing, traipse, Grummet ladder Mountain, remote, the ends of the world, Climb Crossing, trudge