In the period 1400–1800 maritime trade and piracy connected China and Japan to each other and also to Korea, Southeast Asia, and Europe. All through the period China and Japan traded extensively with each other as well as with Korea. Both Korea and Japan relied on Chinese coinage, and China relied on silver from Japan. During the fifteenth century China launched overseas expeditions. Japan was a major base for pirates. In the sixteenth century European traders appeared, eager for Chinese porcelains and silks. Christian missionaries followed, but despite initial successes, they were later banned, first by the Japanese government and then by the Chinese government. Political changes in Europe changed the international makeup of the European traders in East Asia, with the dominant groups first the Portuguese, next the Dutch, and then the British.