, this abacus school has been busier. parents want their children to use how to learn the asian device. >> translator: it's interesting, because you can calculate faster if you learn how to use abacus. >> translator: i am better at math now at primary school. >> reporter: the decision has revived interest in the traditional calculator. this museum has many kinds of abacuses, and it's attracting more visitors. the founder and director has been collecting rare abacuses since he was young. his hobby lent him to set up this museum 20 years ago. the admission is free. visitors can learn about the long history of the abacus. about 1,300 of the devices are on display. this silver charm is from the ming dynasty. brides used to wear them. the wife were supposed to use them to keep track of family assets. this ancient abacus might have been used for fortune telling. it is perceived as a lucky charm to increase business. he wants visitors to learn the history of china's decisions with neighboring countries through the abacus. >> tra