The Chinese yuan, also known as the renminbi, is already convertible under the current account - the broadest measure of trade in goods and services. However, the capital account, which covers portfolio investment and borrowing, is still closely managed by Beijing because of worries about abrupt capital flows.

China Rongsheng says four very large ore carriers like these have been delivered since the beginning of this year. Photo: Reuters

Subsidies keep Rongsheng Heavy Industries in black

China Rongsheng Heavy Industries, the mainland's largest shipbuilder in terms of order backlog, saw interim net profit for the six months ended June 30 plunge 82.3 per cent to 215.77 million yuan (HK$263.7 million), down from 1.22 billion yuan in the same period last year.