The first paragraph of "Ode to Red Cliff" writes about "Su Zi and his guests" the joy of boating on Red Cliff on a moonlit night. How is this "fun" expressed?

The author "boated with guests under Red Cliff" and fell into the embrace of nature, enjoying the beauty of the breeze, white dew, mountains, flowing water, moonlight and skylight. Under the bright moonlight, a vast white mist envelopes the river surface, and the skylight and water color merge into one. Visitors are now open-minded, comfortable and unrestrained, riding a small boat on the vast and boundless river where "the waves are calm". The waves are floating, just like flying on the wind in space, leaving the world leisurely, detached and independent; and like growing wings and soaring into the fairyland. The vast river and the free and easy mind leap out of the author's writing, and the joy of boating is beyond words. This is the front part of this article describing the "boating" tour to enjoy the scenery. It expresses emotions with the scenery, blends the emotions into the scenery, and the scene is beautiful.