Lo Lo and Co Lao are two ethnic groups with small populations in Vietnam. These are two ethnic groups originating from China who migrated to Vietnam at different times in history and have lived for a long time in the border area of Ha Giang province. During their long history, they have built up their own cultural characteristics and values that are enough to be identified as one of the 54 ethnic groups in Vietnam. At the local level, their culture is also an important part of the culture of ethnic minorities in Ha Giang province. This book presents the following main contents: 1. Theoretical and practical issues in the study of ethnic cultural characteristics; 2. Cultural situation of Lo Lo and Co Lao ethnic groups; 3. Cultural characteristics and the issue of preserving and promoting the cultural characteristics of the two ethnic groups Lo Lo and Co Lao.