to signal interest or intention to cooperate; to court or recruit a person or organization

这家大公司已经向他抛绣球，希望他能加入研发团队。

noun · the traditional custom of throwing an embroidered ball as a flirting game, especially at Zhuang festivals

壮族青年男女在节日里通过抛绣球来表达爱慕之情。