The 21st Century Maritime Silk Road, commonly just Maritime Silk Road (MSR), is the sea route part of the Belt and Road Initiative which is a Chinese strategic initiative to increase investment and foster collaboration across the historic Silk Road.

The Belt and Road Initiative, known in China as the One Belt One Road and sometimes referred to as the New Silk Road, is a global infrastructure development strategy adopted by the Chinese government in 2013 to invest in more than 150 countries and international organizations. The BRI is composed of six urban development land corridors linked by road, rail, energy, and digital infrastructure and the Maritime Silk Road linked by the development of ports.