I asked this question in the Wisdom of the Crowd:

Should China object to western leaders visiting Taiwan?

Here are the responses: (13 Votes)

54 % - China should ignore the visits, and avoid generating tensions with the western countries.
46 % - China should object strongly, as it contravenes its sovereignty over Taiwan

See the pie chart at:
http://www.tklcloud.com/Crowd2/chart.aspx?ID=2866

CLick here to vote on the current issues:
https://tklcloud.com/Crowd2/active_issue.aspx