For today's A Portfolio, we look at the works of Zhongshan, China born, NYC-based Leon Xu. His graffiti experience can be seen in his airbrush cityscapes, and the San Francisco raised artist seems to have a dream-like quality to his work. As Boooooom wrote a few years ago, "Attentive to what he describes as 'brain tingles'—instinctual cues nudging him to capture a particular moment so he can reflect on it later through the act of painting—Xu finds a meditative solace in his creative practice."