Are Chinese military drills and exercises a cause for concern?

China is "flexing its muscle" but is that necessarily a bad thing? Obviously the US and China do not always have the same goals in mind, but the line differentiating them has gotten somewhat fuzzy. Perhaps we can benefit from the Chinese military actions and work with them for security and stability in the region.

http://www.voanews.com/content/china-stages-huge-military-drills-in-south-china-sea/2886590.html

What do you think?