Tā zài kējìjié shàng zhǎnshì le zìjǐ zuò de jīqìrén.
He showcased the robot he built at the science festival.
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culture
Most Chinese primary and middle schools hold an annual 科技节 with student-built projects, paper airplane contests, and science quiz competitions — a staple of campus life alongside 运动会 and 艺术节.
