2020-12-19 822
History of fingerprint identification: as early as more than 2000 years ago, people in ancient China used fingerprints to sign contracts and solve cases. The book Yunmeng bamboo slips during the Warri
2020-12-19 809
As we all know, with the continuous development of science and technology, people's days and homework become more convenient. Now there are more and more intelligent products on the market. Now m