The Chinese Grammar Wiki began in 2012 as a modest website with a bold vision: to record all of the grammar structures in the Chinese language, categorize them by difficulty level, explain each one in clear, jargon-free English, and link them all together. Initially the wiki was a resource exclusively for the clients of AllSet Learning’s Shanghai-based learning consultancy. https://www.amazon.com/Chinese-Grammar-Wiki-BOOK-Intermediate/dp/1941875653