Beijing will build 18 new sports venues for the Olympic Games, which will be held in China for the first time. It is expected to cost US$3 billion. Among them, the core National Stadium is called the "Bird's Nest" because it looks like a huge bird's nest made of branches. The gray steel mesh is covered with a transparent membrane material and covers the bowl-shaped earth-red stadium stands. In addition to hosting the opening and closing ceremonies of the Olympic Games, this giant building that can accommodate 80,000 people will also host important Olympic competitions such as track and field and men's football finals here.