Not very easy. The best structure seems to be, to setup a parent company in Hong Kong. Then, setup a wholly owned subsidiary in China. Then, just send enough money every month to keep the China operations going. It is easy to get your money in and out of Hong Kong.
I went to Hong Kong earlier this year, and I was amused by how there were luxury watch shops seemingly everywhere. My first assumption was that they were for laundering money out of the mainland.
Yup. Flying with hard currency or equivalents is difficult. Just don't bring the receipts or boxes for your new watch, bracelet, ear rings, and neck chain.
