He'd be able to say "Hi" and apologize for his inability to speak Mandarin. And figure out how to pronounce everyone's names, if given the pinyin!

Lin Jing is also some sort of scientist type, so he'd have decent English. (Likely more decent than Shen "what is a computer" Wei's, in any case. A lot of ESL English education happens through the internet by happenstance...) I don't think we're ever told whether Zhu Hong went to school, but given that she's their secretary/HR, she's at least read some schoolbooks/osmosed enough about the Haixing reality that she's not utterly lost.