China Investment Corp has requested more capital after deploying all its current funds, a senior official at the country’s main sovereign wealth fund has said in a rare public expression of frustration with its government minders.

CIC works with $200bn in central government funds, which it was granted when established in the fall of 2007. A second $200bn injection from the government, talked about more than a year ago, has so far failed to materialise.

The remarks from Wang Jianxi, executive vice-president, who spoke to reporters on Saturday and is expected to retire this year, follow months of lobbying the State Council. Most of China’s $2,850bn in foreign exchange reserves are managed by State Administration for Foreign Exchange, which comes under the auspices of China’s central bank.