Single Cosplay competes for quality and creativity, while combined Cosplay has more unknown variables. Coser seem to be independent individuals, but when they move, unexpected "chemical reactions" will occur. Cosplay, an improvised live group, is often very popular. These people don't even know each other, and they "touch porcelain" with their cos image.
https://www.ccosplay.com/

As for the definition of Cosplay, after talking with professionals, we think it may be divided into narrow and broad dimensions. Cosplay in a narrow sense is the imitation of cartoon image, but in a broad sense, as long as you dress up different from your own identity, it can be regarded as Cosplay. In this way, many popular TV drama images can also be imitated. Don't think that imitating real people's images is very simple, and it's necessary to do just the right thing. Everyone is just ordinary people, but these ordinary people are themselves in one second, and they can choke now in the next.