No, according to the query of official website of Kunming University of Science and Technology, the ethnic preparatory class of Kunming University of Science and Technology is not a higher vocational undergraduate course. Preparatory classes for ethnic minorities are preferential policies formulated by the state for ethnic minority candidates. It is listed as an admission batch separately in the college entrance examination. Candidates who have obtained preparatory classes for ethnic minorities need to study for one year before they can enter the corresponding undergraduate schools. Higher vocational undergraduate course is a kind of undergraduate education mode set up by the state to train applied undergraduate talents.