Nevertheless, Nathan and Scobell argue that, despite its growing power, China’s international position remains almost uniquely precarious. China borders more countries that any nation on earth, and continues to have border disputes with several of the most powerful. Other strong states, such as the United States and Japan, threaten China’s littoral. Internally, political discontent threatens Beijing’s control of outlying areas, including Tibet and Xinjiang. Concerns about political discontent and the maintenance of economic growth continue to draw the Chinese Communist Party’s (CCP) focus inward.
On a related point see here, although I suspect that there are some translation issues regarding the terms “invasion” and “occupation.”