欧阳修
百啭千声随意移，
山花红紫树高低。
始知锁向金笼听，
不及林间自在啼。
Ouyang Xiu
Crooning and chanting to their hearts’ content,
On trees high and low, blooms red and purple.
Now I know that birds’ singing in a cage
To those in the woods are unmatchable.