五五百年
Từ Điển Thuật Ngữ Phật Học Hán Ngữ
The five periods each of 500 years. In the tenth chapter of the 大集月藏經 the Buddha is reported as saying that after his death there would be five successive periods each of 500 years, strong consecutively in power (1) of salvation, (2) of meditation, (3) of learning, (4) of stūpa and temple building, and finally (5) of dissension.