2025-08-13 00:00:00 Manage cash register online on mobile phone (Replace paper book): + Cashiers receive online payment books from mobile phones. + Perform online collection at customer's home or centralized collection location, update payment status in real time. + Monitor the location and time of staff collection on the map. + Allows printing of receipts at customers' homes or at centralized collection locations when customers have paid VSMT via thermal printers connected to bluetooth with mobile phones.