Does a singer work for three hours as a part-time job?

Singers work three hours, not part-time. The singer's working hours are determined according to the performance arrangement, and there may be different performance times. If a singer only performs for three hours on a certain occasion, it doesn't mean that he is a part-time job. Because singers may have various music-related jobs at other times, such as rehearsal, recording, creation and so on. In addition, singers may also sign long-term contracts with record companies to perform some routine tasks according to the agreement. Therefore, it is impossible to judge whether a singer is a part-time job simply from a performance period.