True, but foreign business expertise and technology uses goes hand in hand with foreign investment (otherwise, why bother?). So China isn't going to get the former, if they don't make the later easier.

Ease of capital flow is one reason why Singapore has done so well (among many reasons). You can turn Singapore dollars into whatever currency you want, in whatever quantities and move it out of the country with no barriers at all.

Plus the rule of law, which means the government is predictable in its decision making. Singapore isn't going to turn around and nationalize a bunch of foreign industries any time soon, because they realize the second they do, all that foreign capital is going to disappear very quickly.