Nian means years and Lun means cycle or ring. Nian Lun actually refers to the growth rings on the inside of a tree with each tree ring representing a year of the tree’s life, with scientist being able to judge the age of the tree from the number of tree rings. It’s very meaningful because these tree rings are used as a metaphor for the time and the feelings she keeps sealed over time like the tree rings in the middle of the tree trunk.