A China Construction Bank Corp (CCB) branch in Zhenjiang, Jiangsu Province. CCB's first-half profit jumped more than 31 percent to a record as credit demand climbed. [China Daily]

China Construction Bank Corp (CCB), the world's second-largest lender by market?value, said Bank of America Corp (BofA) would?keep no less than 5 percent stake in CCB, even though the US-based bank will be allowed to sell?part of the?stake after this month.

BofA is the second-largest shareholder in CCB with a 10.23 percent stake currently. Reuters reported earlier that it is in talks with potential buyers?to?divest part of its US$17 billion worth of stake.

Of the 25.6 million CCB shares it owns, 23.6 million come out of a lock-up on Aug 29. The remaining shares may be sold freely as of 2013.

CCB has extended its tie-up with BofA until the end of next year and is in talks to extend the arrangement for another five years, but the new contract will not involve shareholdings, said Guo Shuqing, chairman of the Beijing-based lender.

Guo said that the banks' cooperation had been a success and could set a good example for industry counterparts.

"Although BofA is in difficulties, we believe the experienced international player will recover gradually. It will still be our long-term strategic partner," Guo said.

CCB's first-half profit surged by more than 31 percent year-on-year to a record due to a climbing demand for credit driven by tightened liquidity.

According to a statement to the Shanghai Stock Exchange on Sunday, its net income?rose to 92.8 billion yuan ($14.5 billion) from 70.7 billion yuan a year earlier.

BofA?needs to raise capital due to mortgage foreclosure, Bloomberg reported.

Its shares dropped more than 23 percent in the past month..

Reuters has reported the bank would lay off 3,500 employees in the third quarter.

Chen Zuofu, vice-president of CCB, said the bank would give top priority to establishing domestic outlets in the next three years because it lags far behind other Chinese banks such as Industrial and Commercial Bank of China (ICBC) Ltd and Agricultural Bank of China Ltd in terms of the number of domestic outlets.

CCB will not head into overseas markets as aggressively as some of its Chinese counterparts, Guo said. He said the bank aims to increase the contribution of profit from overseas branches from the current level of more than 2 percent to an ideal level of 5 percent within five years.

"We are quite prudent on our overseas development strategy and we don't want to extend our network in developed markets such as Europe and the United States," Guo said at a news conference in Beijing.

He added that the bank had little interest in extending its overseas business by acquiring local banks whose market value had contracted substantially in recent years. "That may not accord with our own strategy," he said.

To further replenish capital, the bank has said that it plans to raise no more than 80 billion yuan by selling yuan-denominated subordinated bonds in the Chinese mainland and Hong Kong by the end of August 2013.

Guo said the exact amount of bonds to be issued in Hong Kong was still up to regulators, but that CCB wanted to sell as much as possible in Hong Kong because issuing costs are far lower than on the mainland.

The bank does not plan to raise funds through equity sales within the next three years, he said.

Since the year began, major banks in China have turned to the inter-bank bond market to raise capital against the backdrop of higher capital adequacy requirements.

ICBC, the world's largest lender by market capitalization, sold 38 billion yuan of subordinated bonds in late June, while Bank of China Ltd sold 32 billion yuan of 15-year subordinated bonds in May.

The China Banking Regulatory Commission said in May that tougher capital adequacy rules would take effect at the beginning of 2012.

For major banks, the requirement stands at 11.5 percent, while that for less important banks stands at 10.5 percent.