China's rulers are reluctant to get more heavily involved for a number of reasons, say analysts here, ranging from their mistrust of American intentions to a fear of being sucked out of their depth into the Middle East maelstrom. They are also disappointed that Western governments have been skeptical about Beijing's hardline response to ethnic unrest among Uighurs in Xinjiang, and they are adamant that only the United Nations can authorize military action in a sovereign state's territory.