For a country that believes strongly in noninterference in other countries' internal affairs, China, oddly, is constantly telling other countries what they can and cannot talk about.

Last week, China again was putting on the pressure, this time on Japan, host of the Group of Seven foreign ministers' meeting last Sunday and Monday in Hiroshima, as well as on the other participant countries, not to discuss South China Sea issues.

In March, Chinese Foreign Minister Wang Yi publicly accused Japan of "double dealing," saying Tokyo on one hand proclaims "nice things about wanting to improve relations," but on the other hand "they are making trouble for China at every turn." Clearly, talking about the South China Sea comes under the heading of "making trouble," and Wang didn't want Japan to put this issue on the agenda.