Commercial opportunities in the city attracted native and especially Chinese and Arab immigrants. This sudden population increase created burdens on the city. Tensions grew as the colonial government tried to restrict Chinese migration through deportations. Following a revolt, 5,000 Chinese were massacred by the Dutch and natives on 9 October 1740, and the following year, Chinese inhabitants were moved to Glodok outside the city walls. At the beginning of the 19th century, around 400 Arabs and Moors lived in Batavia, a number that changed little during the following decades. Among the commodities traded were fabrics, mainly imported cotton, ''batik'' and clothing worn by Arab communities.