Welcome to Shall We Talk - Mandarin
https://anchor.fm/shall-we-talk/episodes/Ep1-Greetings-e12nk7k
Let us start the Ep1 with Greetings.
你好 nĭ hăo- it's just like Hello in English and wish the other is fine & well.
你们好 nĭ mén hăo- wish all of you is fine.
们 is a plural marker:
For Example, 我 （wǒ - I/ Me), when we add 们 behind 我， 我们 means We/Us
你 ( nĭ- You)- 你们 plural for You
他 (tā- He)- They/ Them
大家好 dà jiā hăo- used when you wish a large group of people (i.e: audience in Ted Talk)
再见 （zài jiàn）- Goodbye & See yay.