S 100. The first batch of World Bank loan all-in-one machines in Puning City, Guangdong Province in 2020 were produced by Shenzhen Dingxintong Technology Co., Ltd., with the model of s 100. This all-in-one machine adopts advanced technologies such as capacitive multi-touch screen and high-definition camera, and supports various interactive modes such as voice, image and text, which can realize remote teaching, online question answering and real-time interaction.