In October 2000, during the excavation of this ancient cemetery, Hanoi discovered a number of rare inscriptions of bronze for the time of its invention (September 13, 2000), and the ancient bronze for the time of its invention (October 10, 2000), the ancient bronze for the time of its invention (October 10, 2000), and the ancient bronze for the time of its invention (September 13, 2000), and the ancient bronze for the time of its invention (October 10, 2000) and the ancient bronze for the time of its invention (October 10, 2000), and the ancient bronze for the time of its invention (October 10, 2000) and the ancient bronze for the time of its invention (October 10, 2000) and the ancient bronze for the time of its invention (