The Ullens Center for Contemporary Art (UCCA) just opened a new exhibition "Feelings are Facts," the fruit of a collaboration between Olafur Eliasson, the Danish-Icelandic artist, and Ma Yansong, one of the most prolific Chinese architects. The two artists have created a site-specific installation for the UCCA’s Big Hall, uniting architecture, light and fog. Eliasson is known for his exploration of human perception, and he often works with light, shadows, color, water, wind or fog to make viewers of his works think about their spatial experience. Ma's architecture stands at the forefront of new experimentation in building structures, refashioning form in bold pursuits of perfection. Their collaboration invites the audience to enter an endless space of fog, with color emanating from fluorescent tubes of red, green and blue. By moving through the space, the colors blend, and thus the viewers endlessly create their own color spectrums.