City University of Hong Kong
Note: Mac users need to use Firefox 3 (download link) to access GoChinese.

International Putonghua Club/Putonghua Salon aims to provide a platform for students to practice Putonghua/Mandarin after class. we offer individual counseling for non-native Chinese speakers of different levels.
It's free, and you don't need to register beforehand! 
Time: Every Friday 16:00-17:50 
Y5-305 Yeung Kin Man Academic Building (Academic I) 

Facebook Page: Activity announcement, general information, activity photos and videos ect....(Link)

Facebook Group: Q&A, making new friends

Video and audio tutorials, useful resources on Learning Putonghua