Study on the social fire in the northwest of Hebei Province Study of Hakka vernacular architecture in the northeast of Guangdong province Study on the dialects and cultures in the transitional area in the southwest of Hubei province 并列题名：Study of Hakka vernacular architecture in the northeast of Guangdong province 并列题名：Study on the dialects and cultures in the transitional area in the southwest of Hubei province Study on the political culture construction of the northwest ethnic minority