In 1565 the Spanish developed a Manila galleon trade route (also called "nao de la China") where they took silver minted in the Potosí area of Peru or in Mexico and traded it for gold, silk, porcelain, spices and other goods from China and other Asian areas including the Spice Islands. There was a great demand for silver in China. They also traded for gold objects which could be gotten in China in this time period at a silver:gold exchange rate of about 5:1 whereas the rate in Europe was about 16:1. The Spanish centered their trade in the Philippines at first around Cebu, which they had recently conquered, and later in Manila after they conquered it. The trade between the Philippines and Mexico involved using an annual round trip passage of one or more Manila galleons. These poorly defended galleons left Acapulco Mexico loaded with silver and sailed to the Philippines in about 90 days following what's called now the north equatorial current and trade winds.