《太平广记·卷二百一十二·画三》
冯绍正先在西墙上画一条白龙，形状奇特蜿蜒欲飞，没画到一半，似乎有风云随着笔的挥动而产生。
绍正乃先于西壁画素龙。奇状蜿蜒，如欲振跃。绘事未半，若风云随笔而生。
Feng Shaozheng first painted a white dragon on the west wall, its shape was peculiar and winding, and before it was half painted, it seemed that wind and clouds were produced with the stroke of the pen.