In the 1850s and 1860s, many Kangchu abandoned their plantations in Singapore as gambier produce declined due to over farming of the soil, and began to establish new gambier and pepper plantations in neighbouring Johor. Nevertheless, many of these Kangchu settled down as merchants in Singapore and managed the gambier and pepper farms by proxy, mainly through the liaison body of the Ngee Heng Kongsi which had members in Singapore and Johor. Some of these merchants purchased the property rights of gambier and pepper farms from the Kangchu in Johor, who would then assume managerial tasks to ensure the smooth operation of the plantation and the settlement.