Located on the side of the Dasanba archway, the grand fort, also known as the Sao Paulo fort, the central fort and the Big Sanba artillery, is part of the Saint Paul College and the Saint Paul Church. Built in 1616 A.D. during the reign of Shenzong in Ming Dynasty, the cannon is one of the oldest Western-style cannons in China. Owned by the Church, it was built to protect St. Paul's clergy from piracy and then turned into a military facility area. In the past, the fort was situated in the center of Macau. It took the responsibility of defense and was a military priority. The big gun platform is the main attraction in Macau. Every time you come to the big three buses, you have to go up and walk. There is a free small park. There is a long line of Portuguese cannons beside the city wall. They are directed in all directions. One of the cannons is directed at the new Portuguese capital. It will take such a picture here. It's very interesting. There is a lot of open space on the gun platform, with green grass and trees all around it. Luxuriant, good air, overlooking the whole Australian landscape at the top, see the old and new Portuguese capital, and more overlook the Pearl River Estuary and Gongbei area scenery, the old residential buildings and a luxury five-star hotel become a sharp contrast, residential buildings as seen in the film, very age-old feeling.