To count one's chickens before they hatch; to be prematurely optimistic about future gains or results.
小明刚刚开始学习编程，就想着靠写程序赚大钱，真是有点见弹求鸮炙了
Xiao Ming just started learning programming, but he's already dreaming of making a fortune by writing programs; he's really counting his chickens before they hatch.
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