Many young people like to go to big cities to forge their own paths.
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usage
闯荡 carries a sense of youthful ambition and adventure. 闯 means to break through/barge into, 荡 means to wander/drift — together they convey a bold, wandering spirit seeking opportunity away from home.
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Slightly romanticized tone; often used positively for someone brave enough to leave their comfort zone. Common in phrases like 闯荡江湖 (to roam the martial world) and 闯荡社会 (to make one's way in society).