What is good evening ladies and gentlemen in Chinese?

There are a few ways to say "Good evening, ladies and gentlemen" in Chinese, depending on the context and formality:

Formal:

* 各位女士先生，晚上好！ (Gè wèi nǚshì xiānshēng, wǎnshàng hǎo!) - This is the most formal and literal translation. It directly translates to "Ladies and gentlemen, good evening!"

* 女士先生们，晚上好！ (Nǚshì xiānshēngmen, wǎnshàng hǎo!) - Similar to the above, but uses the plural form of "ladies and gentlemen."

Informal:

* 大家晚上好！ (Dàjiā wǎnshàng hǎo!) - This is a more casual greeting, translating to "Good evening, everyone!"

* 各位晚上好！ (Gè wèi wǎnshàng hǎo!) - This is slightly more formal than "大家" (dàjiā) and translates to "Good evening, everyone!"

Note: The choice of "晚上好" (wǎnshàng hǎo) can be replaced with "晚安" (wǎn'ān) which means "good night" if the event is taking place later in the evening.

The best option for you will depend on the situation and your relationship with the audience.