The chronology of Islam’s arrival in Southeast Asia is not known exactly. From at least the tenth century, Muslims were among the many foreigners trading in Southeast Asia, and a few individuals from Southeast Asia traveled to the Middle East for study. In the early stages of conversion, trade passing from Yemen and the Swahili coast across to the Malabar Coast and then the Bay of Bengal was also influential, as well as the growing connections with Muslims in China and India. Muslim traders from western China also settled in coastal towns on the Chinese coast, and Chinese Muslims developed important links with communities in central Vietnam, Borneo, the southern Philippines, and the Javanese coast. Muslim traders from various parts of India (e.g. Bengal, Gujarat, Malabar) came to Southeast Asia in large numbers and they, too, provided a vehicle for the spread of Islamic ideas.