This site is best described as a Chinese version of Quora, so in other words a site where people ask and answer questions (and discuss other people's questions and answers). Read more.

zhihu.com

TutorMandarin is an online Chinese tutoring software and service. Students take 1-on-1 classes with professional Mandarin tutors on PC, Android, or iOS. Full courses from Beginner to Advanced, Spok... Read more.

tutormandarin.net

This page offers several hundred lessons for Chinese about different topics, including both reading practice and listening. They also have some learning activities, including quizzes. I have tried ... Read more.

gloss.dliflc.edu

*The following introduction was written by John Renfroe and published here: [Learning Classical Chinese is for everyone (no, seriously!)](https://www.hackingchinese.com/learning-classical-chinese-... Read more.

amzn.to

This is a very in-depth article about how Pinyin is written, focusing mainly on the letters used, the typeface, arrangement on the page, and so on. It probably contains more about this topic than y... Read more.

thetype.com

This is a Wikipedia article about classical Chinese written entirely in classical Chinese. That makes it difficult reading for most students, but I find the idea behind this article very neat and t... Read more.

zh-classical.wikipedia.org

From their website (if you have personal experience of their courses, please leave a comment): New Concept Mandarin specializes in teaching Mandarin Chinese (Putonghua) as a second language. Act... Read more.

newconceptmandarin.com