The "Color Mixing" class has gone through the evaluation successfully. Now it is truly online. You can take this class on the internet without the concern that video takes too much your computer space for downloading. Please visit: http://www.qh-art.com/online-teaching.html for details. Thank you so much for supporting me. During this difficult time, I have seen more the beauty of the human nature. Let's help each other, we will go through the hard time, and the world will be more beautiful.