Wireless innovations never stop. Over the past decades, we have witnessed the evolution from 1G to 5G networks. Despite such development, wireless communications is still playing a key role in building up the ubiquitous connectivity for networked society. Aligning this trend, this project aims to design new promising paradigms for the sixth generation (6G) wireless communications networks and beyond, including terahertz communications, ultra-reliable and low latency communications, and intelligent communications.