Hello

你好 (Nǐ hǎo)

Good morning

早上好 (Zǎoshàng hǎo)

Good afternoon

下午好 (Xiàwǔ hǎo)

Good evening

晚上好 (Wǎnshàng hǎo)

How are you?

你好吗? (Nǐ hǎo ma?)

Goodbye

再见 (Zàijiàn)

See you later

回头见 (Huítóu jiàn)

Take care

保重 (Bǎozhòng)

Have a nice day

祝你有个愉快的一天 (Zhù nǐ yǒu gè yúkuài de yītiān)

Good luck

祝你好运 (Zhù nǐ hǎo yùn)

Cheers

干杯 (Gānbēi)

Happy New Year

新年快乐 (Xīnnián kuàilè)

Merry Christmas

圣诞快乐 (Shèngdàn kuàilè)

Happy birthday

生日快乐 (Shēngrì kuàilè)

Congratulations

恭喜 (Gōngxǐ)

Welcome

欢迎 (Huānyíng)

Thank you

谢谢 (Xièxiè)

You're welcome

不客气 (Bù kèqì)

I'm sorry

对不起 (Duìbùqǐ)

Best wishes

最美好的祝愿 (Zuì měihǎo de zhùyuàn)