illegal. According to the Law of the People's Republic of China on Public Security Administration Punishment, it is known that it is illegal to set off fireworks or other items in the venue and disturb the order of large-scale mass activities such as culture and sports, and be given a warning or fined below 2 yuan. If the circumstances are serious, it is illegal to be detained for more than 5 days but less than 1 days. Music Festival is a temporary musical performance, which has the necessary conditions of temporary existence, multiple artists performing in turn and a large number of people.