Google, Yahoo and MSN have all made allowances for working
within China, while national search engines such as Baidu and SoHu operate
under the same set of restrictions but are able to work within them, as they
are Chinese national companies. The American based companies have also made
allowances. Explain in detail how each American company has had to adjust their
economic model to suit Chinese national laws and regulations. This should be an
in-depth paper that explores how each company approached the rules and
requirements for working in China.