Kapitan Cina
During the 1880s, the sovereign rulers of Johor, Temenggong Ibrahim and his successor, Sultan Abu Bakar introduced the Kangchu system and actively encouraged the Chinese leaders to set up new gambier and black pepper plantations and to bring in the Chinese immigrants as agricultural settlers and labourers to open and work in these plantations in Muar. A Western-style contracts (termed as "Surat Sungai" in Malay, literally "River Documents") to the Kapitan Cina (Chinese leaders) who have established the plantations along river banks in Johor. Letters of authority ("Surat Kuasa") were issued when the first Chinese leaders began settling in Johor during the 1850s. The Temenggong quickly established goodwill relations with the Kapitan Cina by appointing one Malay administrator, Muhamad Salleh bin Perang, the Dato' Bentara Luar who was able to speak the Teochew dialect, the language spoken by most Kapitan Cina and settlers and able to read Chinese for these purposes. Influx of these settlers mainly of Teochew origin, and were generally first- or second-generation ethnic Chinese who became an important part and parcel of life and population of Muar until today and helped shape the population demographic and the social economy of Muar. There is even a town called Bukit Gambir meaning "Hill of Gambier" in Muar.