Great website for helping with learning Mandarin.  Suffice to say that most people will leave a comment on helpful sites like this because they want to express how grateful they are to the authors putting the content up in order to help us learn.  Your website is everywhere where people are highlighting good website to help with learning.  Which is how I happened upon your website.  I have it constantly on my desktop among some other resources - only the best of the best of course.  Thank you once again for this website.  My Mandarin has really come on in leaps and bounds and to think I was going to give up but with a website like this it's very encouraging.