What tree does Tomb-Sweeping Day plant in front of the tomb?

Dragon cypress is the best variety in the tombs of Tomb-Sweeping Day, which means evergreen all the year round, second only to Longweiqi. It is generally planted with even numbers, 2, 4, 6 and 8. The tombs of the 10th emperor, such as Ming Tombs, Ganling and Dong Qing/Xiling, all planted cypress trees.

Evergreen Greening Garden in Jinan, Shandong Province: The cypress grows to a certain height, and its branches spiral upward, which looks like a dragon, hence the name "Longbai". In many ancient records, it is also mentioned that cypress has the function of exorcism. It was planted next to the grave to protect ancestors from "ghosts", so cypress was an auspicious plant in ancient times.