Jie Zheng, a native Mandarin speaker from Shanghai, China is a owner and founder of Mandarin in Marin. She received her Master's Degree in Education at Sonoma State University. Mandarin in Marin trains early childhood learners, youths and adults in Mandarin Chinese - the world's most popular second language. Given your child (and even yourself) the gift of becoming bilingual. It's one of the best investments you can make.