The Chinese in Lasem is a unique entity, they merge in the social life of people who are dominated by ethnic Javanese. This study aims to analyze the contribution of the Chinese in Lasem in the development of social harmony. This research was conducted using qualitative methods with a phenomenological design. The data source of this research came from Chinese figures. Data were collected using in-depth interview techniques. Data analysis uses an interactive model. The results study are: 1) the

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... hinese community has an open mind and a strong national outlook so that they can view differences as social capital to cooperate in development; 2) collaboration between ethnic Chinese in Lasem and Javanese can be seen in aspects of work, religious activities, and social service; and 3) nationalism, history and Pancasila became the dominant factor in shaping the Lasem Chinese mindset about the importance of building social harmony. The conclusion of this study is that Chinese are very important elements of society and play a role in the development of social and economic life in Lasem.