Usages of shàng
他 在 聚会 上 先 简单 介绍 了 自己， 然后 就 跟 大家 聊天。tā zài jùhuì shàng xiān jiǎndān jièshào le zìjǐ, ránhòu jiù gēn dàjiā liáotiān.
At the get-together he first briefly introduced himself, and then started chatting with everyone.
有 的 学生 很 害羞， 不 太 喜欢 在 聚会 上 跟 别人 聊天。yǒu de xuéshēng hěn hàixiū, bù tài xǐhuan zài jùhuì shàng gēn biéren liáotiān.
Some students are very shy and don’t really like chatting with others at parties.
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