The custom of the ancient poem "Imminent Incident on a Walk in the Countryside" is Sh Shu Shu

Immediate Things in the Countryside Walking is a seven-character ancient poem made by Bai Juyi, a poet of the Tang Dynasty, which describes what he saw and heard when he traveled in the countryside in the spring. The poem mentions a number of things related to the customs of the time.

1. Treading Green: Treading Green refers to the activity of stepping out of the city or village in spring to enjoy the flowers, trees and fresh air in the natural environment. It is also an important festival and custom in traditional Chinese culture.

2. Playing with kites: Kites originated in China, and the making and use of kites has been recorded as early as the Han Dynasty. During the Tang Dynasty, kites became one of the common tools for people's entertainment and leisure.

3. Picking mulberry leaves: Picking mulberry leaves means picking mulberry leaves for silkworms. During the Tang Dynasty, mulberry trees were planted and sericulture was popular, so picking mulberry leaves became an indispensable part of farmers' life at that time.

4. Gleaning Needles: Gleaning needles refers to picking up small items such as needles that have fallen on the ground or elsewhere and returning them to their owners. This custom embodies the concept of "propriety, justice, honesty and shame" in traditional Chinese culture, that is, the need to respect the property rights of others and the fruits of their labor.

To summarize, the ancient poem "The Immediate Events of the Countryside Walk" touches upon some customs and cultural traditions of the Tang Dynasty.