Xi'an Comet Heavy Industry Machinery Co., Ltd. is located in the beautiful ancient capital of Xi'an, which was called "Chang'an" in ancient times. It is one of the four world-famous an- cient civilizations and ranks first in the ancient capital of China. Today, Xi'an is the capital of Shaanxi Province, one of the seven major regional central cities of China, the Asian Knowledge and Technology Innovation Center, and the manufacturing base of China's large aircraft. It is the largest and most important base of scientific research, higher educa- tion, national defense science and technology industry and high-tech industry in central and Western China.