The history of Islam in Indonesia is complex and reflects the diversity of Indonesian cultures.[21] There is evidence of Arab Muslim traders entering Indonesia as early as the 8th century.[22] By the 15th century, the spread of the religion accelerated via the missionary work of Maulana Malik Ibrahim (also known as Sunan Gresik, originally from Samarkand) in Sumatra and Java as well as Admiral Zheng He (also known as Cheng Ho, from China) in north Java. Islam in Indonesia is in many cases less meticulously practised in comparison to Islam in the Middle East region.[23] Majority of Indonesian Muslims practice Sunni Islam of Shafi school of jurisprudence.[10]