撞大運

to have a lucky stroke / to try one's luck

to knock against / to bump into / to run into / to meet by accident

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

Mandate of Heaven / the Grand Canal, 1800 km from Beijing to Hangzhou, built starting from 486 BC / usually written 大運河|大运河[Da4 Yun4 he2]

to move / to transport / to use / to apply / fortune / luck / fate