在 + 海滩 + 上
海滩 (hǎitān) is a noun meaning "beach." It refers to a sandy or pebbly shore along the sea. It is a common vocabulary word used in travel, geography, and everyday conversation.
孩子们在海滩上堆沙堡玩得很开心。
háizimen zài hǎitān shàng duī shābǎo wán de hěn kāixīn.
The children had a great time building sandcastles on the beach.
这片海滩的日落特别美,值得一看。
zhè piàn hǎitān de rìluò tèbié měi, zhíde yī kàn.
The sunset at this beach is especially beautiful and worth seeing.
夏天我最喜欢去海滩游泳晒太阳。
xiàtiān wǒ zuì xǐhuan qù hǎitān yóuyǒng shài tàiyáng.
In summer, I love going to the beach to swim and sunbathe.