Talk about why this is a great expedition in the history of the Chinese nation by combining the text with the actual life.

The successful launch of Shenzhou V manned spacecraft is a milestone in the development of China's space industry, breaking the monopoly of the United States and Russia in the field of manned space flight, making China the third space power in the world to send humans into space. This is a "greatness" in national strength. The success of the space industry is inseparable from the tireless research and struggle of a large number of scientists, teaching and research personnel and astronauts in China. This is the "greatness" of China people. Flying is the dream of the Chinese nation, and now we are finally looking forward to this day. This is the first time in the history of China, so we say "this is a great expedition in the history of the Chinese nation".

I copied and pasted it, and the title is not clear.