ㄒㄧㄢxiānㄅㄧㄢbiān

  1. 搶先一步晉書··劉琨》:枕戈待旦先吾著鞭。」比喻立功··男兒萬里長征試問慷慨先鞭。」

to take precedence, to make an early start, to lead the way