Which ancient sea trade route connected China to the Middle East and Europe?

The ancient sea trade route connecting China with the Middle East and Europe was the Maritime Silk Road. It was the maritime branch of the wider Silk Road network, linking East and Southeast Asia with the Indian Ocean, Arabian Sea, Red Sea and Mediterranean.

Rather than one fixed route, it was a changing chain of sea lanes and ports. Ships moved through waters around the Malay Peninsula and across the Indian Ocean, with important commercial centres in places such as Guangzhou, Malacca, Calicut, Aden and Alexandria. Seasonal monsoon winds helped sailors make predictable journeys between Asia, Arabia and East Africa.

Merchants exchanged silk, porcelain, spices, gems, cotton textiles and other goods, while religions, technologies and artistic styles also travelled. Austronesian sailors, Indian and Arab merchants, Persian traders and Chinese mariners all played roles. The usual trap is choosing “Silk Road,” which is broadly defensible but usually refers to the entire network; “Maritime Silk Road” is the precise answer when the question specifies a sea route. “Spice Route” describes related maritime commerce but is not the canonical name here.