China, the most populous nation in the world with more than 1.3 billion people and a history stretching back 3,500 years, has become an increasingly significant force in the world. ItÂ’s a nation just beginning to flex its economic and global muscle. But itÂ’s also a very complex nation facing problems, many of which receive little or no attention outside its borders, according to University of Colorado professors Timothy Weston and Lionel Jensen, co-editors of the book "China Beyond the Headlines," published by Rowman and Littlefield Publishers.