Mandarin for beginners
It's really frustrating to hear them communicate in a language you don't understand a slightly bit.
You only need 200 vocabs to conduct basic conversation. Learning bit by bit and poof! You're now a bilingual or even trilingual!
??. I see that you want to remove the language barrier with your Multinational Chinese client, be it just casual talk or composing mandarin emails like a native, I will be your help at fingertips.
There's no way to explore another culture more efficient than looking into their language.