Does my brother need a banner for his engagement?

Both are ok.

The banner is mainly to express blessings, and the content can be as follows: Let the breeze carry your heartfelt blessings, let the flowing clouds offer your sincere affection, and the air will be filled with intoxicating sweetness tonight and on any day. I wish my dearest friend everlasting love from now on. Love each other as a partner, share the same virtues and have the same heart, and a beautiful marriage. The flowers and candles smile to welcome the winged birds, and the bridal chamber happily blooms with plum blossoms.

Banners are a specification in ancient calligraphy. Modern banners are often promotional banners, including banners on websites and banners that can often be seen on streets, squares, and in front of gates. Because of its low cost, it can play a very good advertising role and is widely used. Usage: modern home decoration, slogans, banners, advertising.