Why is it so difficult for foreign firms to suceed in China?

The Economist this week is full of interesting articles as usual. One that caught my attention is a piece on why foreign firms face so many difficulties in the country. Language and political regime (a capitalist dictatorship) do not explain as many other countries have the same characteristics.

The article says that firms "... they complain about subsidized competition, restricted access, conflicting regulations, a lack of protection for intellectual property and opaque and arbitrary bureaucracy."

I wonder whether China will ever open their domestic market enough to enable serious competition by foreign firms.