This paper uses eight criteria -slope, tourism attractiveness, drainage system density, grassland coverage, forest coverage, community remoteness, altitude, and road network density -to evaluate the ecotourism suitability of China's Liangheyuan (LHY) Nature Reserve. It calculates the criteria evaluation weights from 330 online tourist responses through an analytic hierarchy process (AHP) and uses GIS10.2 space analysis software to analyze the ecotourism suitability of the study area. It

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... the results with the nature reserve's functions to consider ecotourism developments. There are a number of results: 1) The ecotourism suitability of LHY is divided into five levels, with level I having the lowest ecological value and being suitable for mass tourism or general ecotourism. Level V is of considerable ecological value, has high environmental sensitivity, and is suitable for ecotourism with strict environmental constraints. 2) The questionnaire results, reflecting tourist preferences, show that the maximum and minimum weights of suitability evaluation criteria are the drainage system network density (0.2375) and altitude (0.0405), respectively. 3) Large areas of the reserve are classified as moderately suitable, indicating that the study area has a relatively significant potential for ecotourism development. 4) According to the suitability evaluation result and the nature reserve's environmental characteristics, the scientific experimental zone of the reserve is divided into three functional areas and nine themed subareas, all of which have different functions and roles in terms of ecological protection and tourism development.