1. The specific poem and meaning are as follows: The vast grass crosses the plain and comes and goes with the four seasons. Wildfire can't burn it out, but the spring breeze can revive it. Weeds and wild flowers are all over the ancient road, and the end of the grass in the sun is your journey. I once again sent my bosom friend, and the thick grass represented my deep affection. White tea is nothing but waiting for the wind. It expresses the poet's profound understanding of nature and life, as well as his cherish of friendship and regret for parting. Among them, the phrase "white tea is nothing else" expresses the poet's yearning for plain life and cherishing nature and emotion.
2. This poem comes from Bai Juyi's Farewell to Ancient Grass in Tang Dynasty. It is a classic in ancient Chinese literature, and is known as the "crown of farewell poems", which has a far-reaching impact on later poetry creation.