We went into the free National Gallery for a visit. There are a lot of visitors to the National Gallery. Tickets are free, but the paper-based presentation maps are marked with a payment of 1. It's located in a TV screen where the introduction is concentrated. It's written in many languages, including Chinese. The content is very simple, mainly in the library map. No one collects money, and if you need to pay to the coin box after you pick it up, this model was also rare before. On the spot, many tourists picked up the brochure and saw the words marked with fees. Most of them took the initiative to put the brochure back in its original place. Later, it was found that there are many ways of self-consciousness like this in various parts of Britain, which is really a test of people's quality requirements. There are toll-paying voice guides in the gallery, and there are also Chinese ones, because we have limited time, so there is no rent. We started our visit at a loss in this large gallery. Walking to the exhibition hall on the third floor, there are various paintings hanging on the walls of the exhibition rooms arranged in chronological order. These are art treasures of human history. According to the introduction materials downloaded before the trip, we focused on several masterpieces called "the treasure of the town hall". These include : The Entombment of Michelangelo in Exhibition Room 8; "Self Portrait of Age of 34 in Exhibition Room 24; "The Water-Lily Pond in Monet in Exhibition Room 43; "Sunflowers in Exhibition Room 45; "The Virgin of the Rocks in Exhibition Room 57;" The Virgin of the Rocks in Exhibition Room 58. Botticelli's Venus and Mars; Raphael's The Pink Virgin in Room 60 (The Madonna of the Pinks). Because there is a clear number of exhibition room location, so it is easy to find, while looking for the process of viewing the macro scene in the gallery. It is the only way for us to be blind in art and to visit such an art temple on such a pedestrian basis. At the end of the tour, we stood on the balcony of the second floor of the gallery for a long time, enjoyed the macro view of Trafalgar Square and the art performances of the downstairs stalls, where we could also overlook the eye-catching Big Ben. That's the destination of our follow-up tour.