Simply planting trees is not yuanlin, just greening.
仅仅种上树不能叫园林，只能叫绿化。
2
Li Hongsheng, Zhu Yuanlin, Fracture Mechanics of Frozen Soil and Its Application, China Ocean Press, 2002.
李洪升、朱元林，冻土断裂力学及其应用，北京：海洋出版社，2002。
3
Having participated in last April's Earth Day, a retired Geography teacher from Changhua's Yuanlin Junior High School, Zhang Bixia, became involved with conservation work.