Thanks so much, Hami. Already visited your site. But I still think www.hellomandarin.com is the best one. I already learned in this school for 6 months. My Chinese level already gets to Beginner Level 2 from Zero and Survival level and now I am already able to talk with my girlfriend and her parents in Chinese fluently, she is from China. I also tried some other schools or sites before, but finally I think Hello! is really the best one. Hello! is founded by Beijing Language and Culture University and Peking University. It should be the most official online school including its teacher team, volunteers, textbook and level assessment system. I suggest your site should include it and your list should not miss it.