Evaluate the valence intensity of the following sentence, considering the mood of the author. Give a score between 0 and 1 inclusive, where 0 is the most negative and 1 is the most positive.
Sentence: The lookout point at Lok Ma Chau was once known as Hong Kong’s “window on China” — in the years of China’s isolation from the West, tourists would come to the lookout point here and rent binoculars in order to get a glimpse of the great mystery beyond.