The first stop in San Francisco is Union Square. It arrives in downtown San Francisco at 8 o'clock in the morning. After crossing several intersections under the guidance of a tour guide, it arrives at the starting station of the trolley in Union Square. There are two cable cars, Powell-Mason and Powell-Hyde, which are completely manually pulled and rotated to reverse the car. It looks very strange. There were so many tourists in the queue that they waited at least half an hour before they finally sat down. This is a bus hub. Many bus routes are nearby. The traffic is very convenient. The square area is actually quite small. It is not the same as Tiananmen Square and People's Square. But here it exquisitely reveals low-key luxury, with European scenery.