The Hong Kong-China border is the boundary that separates the Hong Kong Special Administrative Region from mainland China. It stretches approximately 30 kilometers and includes various crossing points, allowing for the movement of people and goods between the two regions. This border is significant due to the unique political and economic systems in Hong Kong and mainland China. While Hong Kong operates under a "one country, two systems" framework, the border controls and regulations differ from those in mainland China, affecting travel and trade.