This document provides an introduction and overview of key topics and concepts in land law. It discusses why land law is studied and what it encompasses, including the various interests that can exist in the same piece of land. It also outlines the main sources of Hong Kong land law, such as English common law, statutes, and judicial decisions. Additionally, it examines legal concepts like estates, proprietary interests, equity and how it moderates common law, and the statutory definition of "land".