If the 45,000 sq. m of murals in the 492 grottoes at Dunhuang were connected from beginning to end at a height of 2 meters,the scroll would extend 22.5 km.

• 如果把敦煌492个洞窟45000平方米的壁画按2米高度首尾连接，将会绵延22.；5公里之长。