Trial Sample-Focus on wireless communication equipment, multi-link aggregation, 4G/5G multi-card aggregation, multi-network aggregation, LTE-M, wifi module, variable frequency WiFi, down-frequency WiFi, low frequency WiFi, Mash ad hoc network, smart hardware, embedded system , EDA design technology, microphone array, AI technology, sensing technology, 4G industrial router, RTU, DTU-Cloudlink Technology-Shenzhen Yunlianxin Technology Co., Ltd.