Is there anyone in central california willing to discuss culture/business etiquette

Back in USA I have been back in USA for severall months and just recently moved back to California. I miss many things about China and realize I want to continue my study of Chinese. I hope I can find a language partner in central California.

a few simple phrases for my trip to Mongolia wondered if there is an online group to exchange a few simple phrases before my visit to Mongolia in August 

Is there a service in China that would place professionals with business / family for English tutor?

What is the best way to learn tones online?