因玉山位于距离北回归线2300米处，每年6月22日太阳都会接近垂直照射。
B-Thing B-Location I-Location O O O O B-Abstract I-Abstract I-Abstract I-Abstract B-Metric I-Metric B-Abstract I-Abstract I-Abstract O O B-Time I-Time I-Time I-Time I-Time I-Time I-Time B-Thing I-Thing O O O O O O O O O