The festival in "I miss my brothers in Shandong on vacation in the mountains" is the Double Ninth Festival. What are the two festival customs mentioned in the poem?

The festival in "I miss my brothers in Shandong on vacation in the mountains" is the Double Ninth Festival. The two festival customs mentioned in the poem are: mountain climbing and dogwood planting.

Mountain climbing: There is an ancient custom of mountain climbing on the Double Ninth Festival.

Cornus officinalis (zhūyú): A kind of herb, namely cassia obtusifolia. In ancient times, it was thought that wearing dogwood on the Double Ninth Festival could avoid disasters and ward off evil spirits.

Vacation in the mountains reminds me of my brothers in Shandong.

(Tang) Wang Wei

As a stranger in a foreign land,

Please think twice about your relatives during the festival.

Know where the brothers climb,

There is one person missing from the dogwood.