This paper aims to review the politics of nation building and state building of Indonesia. The central thesis of this paper is that regime change matters in the existence of an interest group, namely PITI, Indonesia Chinese Muslim Association. This association has played a role in bridging the interest of government to control society in the New Order Era, while it also takes an active role to color a more participatory regime in the Reform Era. Data collecting is based on an in-depth interview and literature study.