"Dong Xi yang kao 東西洋考 (On the eastern and western oceans), 1618...is the most comprehensive Ming description of the countries of Southeast Asia." --Cf. Wilkinson, Chinese history, a manual, p. 747.
"...a maritime geography of south Asia...deals with the history, topography, products, and trade of the lands of southeast Asia, including the Philippines, the Moluccas, Brunei (on the north coast of Borneo), ...Indo-China, Malay Peninsula, Sumatra, Java, southwest caost of Borneo, a total of thirty-eight countries; discusses China's relations with Japan and the Dutch 紅毛番 ...revenue, navigation (with compass directions and distances and rhymed rules for weather prediction), and to a certain eunuch revenue collector Gao Cai, who exacted tribute from merchants...until his recall to Peking in 1615....documents and official communications between the Chinese court and various countries including Japan" -- Cf. Dictionary of Ming Biography, pp.77-78.
See also: Franke, W., An introduction to the sources of Ming history, 7.7.4 (p. 221-222).