China is currently the largest exporter of goods in the world. People turn to them for cheap labor, investment, and rely on them as trading partners. China is able to use this momentum to economically force other countries to let them carry out some of their questionable policies without any foreign interference, simply because they can threaten to end trade agreements with countries which do attempt to stop them. That is why many countries and businesses will most likely look the other way when China carries out policies such as this and can legally monitor their people.
Source:
http://www.inthesetimes.com/site/main/article/2304/
In summary, most countries will most likely not do anything, simply they are too afraid to lose investments from a "trustworthy" trading partner.