This work is concerned with ethnic relations or maintenance of identity of ethnic groups, such as, Pakistani Muslims, Yunanese Muslims, Malay Muslims and others. Ethnic relation is a process of adapting one’s ethnic identity to that of the mainstream Thai culture, for instance, Pakistani and Yunnanese Muslims in Chaing Mai Province. They had been assimilated culturally through intermarriages. As time went by and as their population increased, they began to express their Muslim identity more distinctly. Identity expression is indicative of background, history and past political situations that the ethnic groups had been through, for instance, political struggles against the colonizers of the ethnic groups in Laos, Vietnam, Malaysia and other countries in Southeast Asia. The Pakistani and Yunnanese Muslims were instances of minority ethnic groups who had been affected or assimilated amidst the Buddhist majority. The expression of ethnic identity had sometimes meant to maintain their ethnic languages and culture.