What does Yangzhou March fireworks mean?

It should be the fireworks in Yangzhou in March, which is a sentence in Li Bai's "Farewell to Meng Haoran on the way to Yangzhou".

Old friends frequently waved to me, bid farewell to the Yellow Crane Tower, and traveled to Yangzhou in this beautiful spring filled with catkins and flowers.

Sailing alone in the blue sky, I can see the Yangtze River flowing in the sky.

This is a farewell poem, with parting feelings and scenery. The first sentence points out the farewell place: Yellow Crane Tower, the first generation scenic spot; Write the time and destination of farewell in two sentences: the spring scenery of "Fireworks in March" and "Yangzhou" in the southeast; In three or four sentences, write a farewell scene: watch the lonely sail go away; Leaving only a spring. The poem is based on colorful and mottled fireworks and the endless Yangtze River, and depicts a farewell picture of the poet with open artistic conception, endless emotions, bright colors and charming atmosphere. "Fireworks set off in Yangzhou in March", commented by retired scholars in Hengtang: "Eternal quatrains". That's right.