19 15 In July, at the initiative of Sun Yat-sen, the then Beiyang government officially ordered that Tomb-Sweeping Day be designated as Arbor Day every year. Designated place, selected tree species, governments, institutions and schools at all levels in the country to participate in the reservation, hold Arbor Day ceremony and engage in tree planting.

After it was approved on July 2 1 of that year, the country was ordered to abide by the timetable. Since then, we have Arbor Day.

English:1915 In July, at the initiative of Sun Yat-sen, the then Beiyang government officially ordered that Tomb-Sweeping Day be designated as Arbor Day every year. Designate a place and choose tree species, and governments, institutions and schools at all levels in the country will attend as scheduled, hold arbor day ceremonies and plant trees. After it was approved on July 2 1 day of that year, the whole country was ordered to comply with it as scheduled. Since then, Arbor Day has been held in China.

Other knowledge: Modern Arbor Day was originally initiated by Nebraska. 19 century ago, Nebraska was a barren plain with few trees and yellow sand all over the sky, and people suffered greatly. 1872, Julius Sterling Moreton, a famous American agronomist, proposed to stipulate Arbor Day in Nebraska to mobilize people to plant trees in a planned way.