Which method of introduction was used in the following passage?
If you are a resident of Taipei and travel overseas, one of the first things you will notice is that cities seem to close their doors during the evening hours when the night has just begun. Supermarkets, department stores, and drugstores close before 9: 00 p.m. Movies stop playing and buses and subways stop running before midnight. The sidewalks are nearly empty, and few cars venture forth on the streets. In Taipei, however, one can play 24 hours every day. Movies run until the early hours of the morning, KTVs and MTVs operate 24 hours, and crowded discos and pubs play loud music to dancers and drinkers until dawn. In Taipei, the nights are as busy as the days.