There are many things in China that are the biggest in the world. The latest one is the world's largest building. It is called the New Century Global Center. It opened this week in Chengdu, Sichuan province. It is 500 meters long, 400 meters wide and 100 meters high. The area inside is 1.76 million square meters. The building is so big that 20 Sydney Opera Houses can go inside. It is almost three times the size of the Pentagon. Thousands of workers built the huge building in three years. The center is part of an important plan to make Chengdu a 21st-century city.

The inside of the center is almost like a small city. There are around 400,000 square meters of shopping space, a 15-screen movie theater and an ice rink. There are also offices, hotels, a Mediterranean village and a water park. The building's owners hope it will bring business and tourists from across the world. It is part of Chengdu's plan to be world famous. Around 14 million people live in the city, but that will increase. The city is one of China's most important areas for business. The area is also home to the world's largest giant panda nature reserve.