Gùshi lǐ de xiǎojīnglíng bāngzhù le mílù de háizi.
The elf in the story helped the lost child.
Tips
usage
小精灵 can refer to mythical elves/sprites in fantasy contexts, or affectionately describe a lively, clever child. 精灵 alone (without 小) is also used for 'elf/spirit' in fantasy genres such as RPGs and anime.
In Pop Culture
精灵宝可梦Jīnglíng Bǎokěmèng
The Chinese name for Pokémon uses 精灵 (spirit/elf); the games and anime are hugely popular in China.