You must, must, must visit this street in Xi'an. Every shop sells either art or art supplies, such as these calligraphy brushes. I went there almost every day and tried to peek into every nook and cranny, but it's just so big. The neighborhood is a series of ancient buildings packed together, kind of like Beijing's hutongs, but fancier. There are several shops that sell high-quality, expensive art, so if you're looking for some investment/heirloom pieces, this is the place to go.