你好

nǐ hǎo wǒ hěn gāo xìng rèn shi nǐ

你好，我很高兴认识你。

Hello. Nice to meet you.

nǐ hǎo tā hěn zhèng shì de shuō

“你好！”她很正式地说。

"How do you do?" she said formally.

hāi nǐ hǎo tā wēi xiào zhe shuō

“嗨，你好。”他微笑着说。

"Oh, hello." he said, with a smile.