WASHINGTON (AP) — When the top echelons of the U.S. and Chinese military get together, they exchange smiles, handshakes and photographs. Behind the scenes, lower-ranking officers are planning for possible conflict. A laborious Pentagon translation of hundreds of books and journal articles by mid-level Chinese military officers shows that Beijing's future military leadership sees U.S. military power as waning and plans to exploit weaknesses in U.S. weaponry and supply lines should conflict occur. The Pentagon analysis of Chinese military writings was disclosed Thursday[, September 18 1997,] to the Senate Intelligence Committee in a hearing on intelligence challenges posed by China....