骑着拖拉机环游世界
[qí zhe tuō lā jī huán yóu shì jiè]
'Ride a tractor around the world.' The netizen might be poking fun at the idea of an adventure, as it would take forever to circumnavigate the earth by tractor instead of by plane. Or it expresses that they are easy-going and don't follow traditional ways of travel.