Learn Mandarin in ILC

I have been learning Mandarin at the ILC for about 2 months, I feel my Mandarin improved a lot and now I can speak a little bit when I go to China for business, sometimes, I need to have presentation in Mandarin, now I can slowly manage to do that, my teacher helped me to build up my confidence. I understand that tones are very important in Mandarin, therefore my teacher told me to keep practising the tones, at the beginning, it is really tough, since all my tones were wrong, and it was so frustrated to correct every single words, but now I can pronounce the tone perfectly , this is really really helpful for my mandarin learning.