You can choose "Spring River Flowers and Moonlight Night", the artistic conception and meaning are very good.

Other guzheng repertoire suitable for weddings:

Feng Qiuhuang

Caiyun Chasing the Moon

Wedding March

Wish to win one's heart

Happy Flowers and Full Moon

Fishing Boat Sings Evening

Extended information:

Spring River Flower Moonlight Night was originally a traditional Chinese pipa song , the title of the song is "Sunset Flute and Drum" (also known as "Sunset Flute Song", also known as "Xunyang Pipa", "Xunyang Night Moon" and "Xunyang Song"). Around 1925, this piece was adapted into a national orchestral piece for the first time. After liberation, it was edited and adapted by many people, making it more perfect and deeply cherished by audiences at home and abroad. The Flower Moonlight Night on the Spring River has also become a famous guzheng song, in the key of A. It is cadenced, soft as water, elegant and beautiful and very pleasant to listen to.

The whole song consists of an introduction, a theme section, eight variations of the theme and an ending. It is a unique variation. This musical form is based on a musical theme section, and other sections are modified using various variations, which enriches the musical expression and promotes the development of music.

This technique is good at being delicate and profoundly revealing the theme content of the music and shaping the image of the music from different artistic conceptions and perspectives. Through the beautiful and simple lyrical melody, the smooth and varied rhythm, and the rich and colorful performance techniques, the music is like a moving long scroll landscape painting, which aptly expresses the poetic feeling of the music.

Reference materials:

Baidu Encyclopedia - "Spring River Flowers and Moonlight Night" Guzheng Music