Free Chinese Learning eBook created by Lingo Bus ( https://www.lingobus.com/ ). Help your kids learn chinese and mandarin easily. Step-by-step tutorials show you how to learn and write chinese. Lingo Bus is an expert on providing 1 on 1 immersive online Chinese classes for children ages of 5-12 years old! Lingo Bus curriculum is designed in accordance with ACTFL and YCT education standards.