Ma Huan
One hundred years after Polo, the Admiral Zheng He(鄭和) came to Java in 1405 AD. When stopped in Tuban, he noted that there were 1,000 Chinese religious Muslim families there. In Gresik, he also found there were 1,000 Chinese Muslim families, with the same amount reported in Surabaya. On Zheng He's seventh (last) visit to Java in 1433 AD, he invited his scribe named Ma Huan. According to Ma Huan, the Chinese and the Arab population of the cities on the northern beaches of Java were all Muslim, while the indigenous population were mostly non-Muslim as they were worshipping the trees, rocks, and spirits.