《太平广记·卷二百一十一·画二》
到了梁武帝太清年间，雷击龙泉亭，将这秘阁的墙震塌，露出曹不兴的这幅《青溪龙》画，人们看了后才知道这幅画是神妙的上品之作。
其画留在秘阁，时未之重。至太清中，雷震龙泉亭。遂失其壁，方知神妙。
During the Taiching period of Emperor Wu of Liang, a thunderbolt struck Longquan Pavilion and collapsed the wall of the secret chamber, revealing Cao Buxing's painting of the Qingxi Dragon. People who saw it realized that it was a divine masterpiece.