Sun Yat-sen's life attaches great importance to afforestation. In 1893, he was "on the Li Shu" political literature on, "China wishes to strong, and must urgently agriculture through science, pay attention to arboriculture."
His speech in Canton in 1924, "Three People's Principles" when repeatedly stressed: "We research to prevent floods and drought in the basic methods are to be planted trees, to build a large-scale national forest."
In 1925, March 12, Sun Yat-sen died in 1928, to commemorate the third anniversary of the death of Sun Yat-sen, held tree-planting ceremony.
After the March 12 as Arbor Day. February 23, 1979,The sixth meeting of the Third National People's Congress in the form of law to determine our country's March 12 as Arbor Day. March 12 each year as Arbor Day to commemorate the significance of Sun Yat-sen.
孙中山先生一生十分重视植树造林。1893年,他《上李鸿章书》的政治文献就提出"中国欲强,必须急兴农学,讲究树艺"。1924年他在广州演讲《三民主义》时反复强调:"我们研究到防止水灾和旱灾的根本方法都是要造林植树,要造全国大规模的森林"。
1925年,3月12日,孙中山先生逝世,1928年,为纪念孙中山逝世三周年,举行植树式。以后将3月12日定为植树节。 1979年2月23日,第三届全国人大常委会第六次会议以法律的形式确定我国的3月12日为植树节。 每年3月12日作为植树节还有纪念孙中山先生的意义。