Usages of xiǎo
他 今 年 二十 岁， 妹妹 比 他 小 两 岁。Tā jīnnián èrshí suì, mèimei bǐ tā xiǎo liǎng suì.
He is twenty years old this year; his younger sister is two years younger than him.
这 只 狗 很 小， 很 可爱。zhè zhī gǒu hěn xiǎo, hěn kě'ài.
This dog is very small and very cute.
Elon.io is an online learning platform
We have an entire course teaching Chinese grammar and vocabulary.