Despite initial hostilities, by 1549 the Portuguese were sending annual trade missions to Shangchuan Island in China. In 1557 they managed to convince the Ming court to agree on a legal port treaty that would establish Macau as an official Portuguese trade colony. The Portuguese friar Gaspar da Cruz (c. 1520 February 5, 1570) wrote the first complete book on China and the Ming Dynasty that was published in Europe; it included information on its geography, provinces, royalty, official class, bureaucracy, shipping, architecture, farming, craftsmanship, merchant affairs, clothing, religious and social customs, music and instruments, writing, education, and justice.