A student participates in an abacus showcase activity in Bandung, Indonesia, on Dec. 4, 2022. (Photo by Septianjar Muharam/Xinhua)
Students participate in an abacus showcase activity in Bandung, Indonesia, on Dec. 4, 2022. (Photo by Septianjar Muharam/Xinhua)
Students participate in an abacus showcase activity in Bandung, Indonesia, on Dec. 4, 2022. (Photo by Septianjar Muharam/Xinhua)
Students participate in an abacus showcase activity in Bandung, Indonesia, on Dec. 4, 2022. (Photo by Septianjar Muharam/Xinhua)