In every part of Indonesia especially in cities always presence the Chinese. But most Indonesian do not know them well. There are actually 4 groups of Chinese who have settled in Indonesia. These 4 groups are based on their language and origin in China. Chinese migration into Indonesia was happened between 16th to 19th century.
- Hokkien people, was coming from Fukien Province as area very important for the history of Chinese trade in the south. They have a character that they are very diligent, patient, and delicate. They are very good in trading. So most of them are economically success. Their migration into Indonesia reached a wide area in east Indonesia, central Java, East Java, and west Sumatra.
 - Teo-Chiu and Hakka (Khek) people from southern part of China in hinterland of Swatow of eastern Kwantung Province. The Teo-Chiu and Hakka people was emplyed in the minings, such as East Sumatera, Bangka island, and Biliton.
 - Kanton people ( Kwong Fu ), was the resident of southern part of Kwantung province. At the beginning they were interested by Indonesian mining industry, and they come with skill. They are the people who own shops, and blacksmiths. They are not as many as Hakka and Teo-Chiu.
 
- Indonesian - Chinese or " Peranakan"
 - Original Chinese or "Totok"
 
This classification is much based  on the degree of their assimilation and acculturation with the local people  and culture. Most Hokkien who migrated first to Indonesia has experienced deep  assimilation and acculturation, even their physical characters are almost the  same as local people due to the marriage exchange. They mostly forget their  language, and speak local language and Indonesian.
Group of migration that live in west Java, Sumatea West Kalimantan there are  still Totok with Chinese villages, speak their own language and continiue their  culture in Indonesia.
During Dutch colonization with the different treatment in social status and  affairs, they did not want to be classified as the local. This is again grown  by the China Nationalist propaganda arises during 20th century. This propadanda  of re-orientating their nation. This is given an advantage again with China  system of nationality of father's blood lineage or nationality based on blood  relation called ius sanguinis. This policy before 1955 had caused double nationality.  The most important from this impact is the growing awareness of the Great China  family or in simple a process of totonized.
In general most Chinese in Indonesia work in trade, especially the Hokkien.  In West Java and West Sumatera they are farmers. In Bagan Siapi-api ( Riau )  the Hokkien are fishermen. The Hakka in Sumatera work as labor in minings, while  in West Kalimantan they are farmers. The Teo-Chiu work as farmers but many also  labor in farm estates in East Sumatera.
The trade of Chinese in Indonesia is based on family's ownership and management.  Mostly small size and do not need worker from outside. If their business growing,  they open new branch which is given to their brother, child or any family member  to manage, except if they build limited corporation do they works with other  Chinese clan or even other ethnic that they consider profitable.
It was a paradigm that the Totok consider the Peranakan is lower in class due  to their mixed blood, while the Peranakan consider the Totok is lower in class  as they are all coming to Indonesia as labor. During Dutch colonization the  Chinese as if they were an autonomous society and was permitted to rebuild their  own culture in Indonesia, and just after the ethnic getting strong the Dutch  realized the situation and closed all education belong the the exclusive Chinese  and their organization. During Japan control on Dutch East India, all western  schools were closed, and again Chinese school rebuilt. After the independence  of Indonesia all educational facility and system were reorganized and adjusted  under the basic constitution of Indonesia, that the Educational Facility is  for all, and no special treatment be exist. Starting from 1957 all Indonesian  must follow the rules no exception of any ethnic.
Kinship system of Chinese in Indonesia is almost the same as main ethnic cultures  in Indonesia such as marriage suggestion and interdiction. The only different  is their family unit is much bigger ( big virilocal ). The status of women in  the past was low and become the subject of her husband, brothers, and their  parent in law. A man pursue to have boy, and as long as the boy has not yet  born, the husband can take more women.
In Indonesia the Chinese follow Buddhist, Kung Fu-tse, Christian and Islam,  although in Great Chine the population are Buddhist. The strong belief of Chinese  is their love to the ancestors, although they are already passed this world,  their body is cremated, and the ash is kept at home, in a ceramic vas. They  also celebrate the Chinese New Year called " Imlek" in Indonesia,  while in Great China it is called " Summer Feast ", and in Bali is  called " Chinese Galungan"
Source : http://www.balitouring.com/culture/chinese.htm

