Because in China culture, red symbolizes auspiciousness, prosperity and celebration. At the same time, red envelopes are usually printed with greetings and patterns, such as dragons, phoenixes and peonies, which symbolize good luck and prosperity. In addition, the materials and styles of red envelope shells are also varied, so you can choose the style that suits you according to your personal preferences and budget. Some people also add metal ornaments or ribbons to the shell of red envelopes to make them more exquisite and special.