The maritime Silk Road follows the old trade route that was opened by the Chinese admiral Zheng He during the early Ming Dynasty. In particular, the establishment of the lockless Suez Canal then strongly promoted maritime trade between Asia and Europe in this area. While many trade flows were interrupted in the 20th century by the World Wars, the Suez Crisis and the Cold War, from the beginning of the 21st century many of the trading centers that had already existed in the 19th century were activated again.