Youth from Shenzhen and Hong Kong participate in a tree-planting activity in Yangtai Mountain Forest Park in northwestern Shenzhen yesterday. They planted 101 Lagerstroemia speciosa trees on the day and unveiled the plaque for the Shenzhen-Hong Kong Youth Forest, symbolizing the evergreen friendship between the youth of Shenzhen and Hong Kong. Yesterday marked China’s 46th Arbor Day, a national day dedicated to planting trees and environmental protection. Xinhua