article_snippet.sent: Guozijian, known as the National School or Beijing Imperial College, was the highest seat of learning during four Chinese dynasties .
article_snippet.sent: A group of men pass under a bridge while navigating a stream at the Summer Palace, a Unesco World Heritage Site .
article_snippet.sent: Beijing's Summer Palace is regarded as the largest and most well-preserved royal park in China, with a collection of gardens and lakes .
article_snippet.sent: Beijing has become such a popular destination for holidaymakers that the Forbidden City announced last year that the Forbidden City would limit the number of visitors.
article_snippet.sent: Beijing's Summer Palace attracts more than 14 million visitors every year, according to Chinese state media.