Terahertz signals, characterized by their extremely high frequency, can provide transmission bandwidth far exceeding that of traditional technologies, making them a powerful means of achieving ultra-high-speed data transmission. Therefore, in-depth research into the propagation mechanisms of terahertz wireless communication and the promotion of its applications hold significant strategic importance for the development of next-generation communication technologies. In the terahertz frequency band, signal propagation faces significant attenuation issues. To effectively compensate for path loss, the use of ultra-large-scale array technology has become a feasible solution. However, the integration of terahertz communication with ultra-large-scale arrays also presents numerous technical challenges, primarily including significant near-field effects and spatial non-stationarity. Specifically, further consideration must be given to the near-field spherical wave channel model and the visible region of ultra-large-scale arrays, and communication algorithms need to be designed to address the aforementioned characteristics of terahertz signals. To tackle these issues, this report presents the research achievements of the team in the field of terahertz communication, including the latest advancements in areas such as channel measurement, near-field channel degree of freedom analysis, high-precision sensing schemes, and low-complexity precoding.