HONG KONG — With China’s exports soaring, even as other major economies struggle to recover from the recession, evidence is mounting that Beijing is skillfully using inconsistencies in international trade rules to spur its own economy at the expense of others, including the United States.

Seeking to maintain its export dominance, China is engaged in a two-pronged effort: fighting protectionism among its trade partners and holding down the value of its currency.

China vigorously defends its economic policies. On Sunday, Premier Wen Jiabao criticized international pressure on China to let the currency appreciate, calling it “finger pointing.” He said that the renminbi, China’s currency, would be kept “basically stable.”

To maximize its advantage, Beijing is exploiting a fundamental difference between two major international bodies: the World Trade Organization, which wields strict, enforceable penalties for countries that impede trade, and the International Monetary Fund, which acts as a kind of watchdog for global economic policy but has no power over countries like China that do not borrow money from it.