April 23 (Bloomberg) -- China may accelerate preparations to loosen the tie between its currency and the U.S. dollar in response to intensifying international pressure for the change, central bank Governor Zhou Xiaochuan said. ``If there is more pressure from outside, it will force us to speed up our reform,'' Zhou said at the Boao Forum in southern Hainan island today, the first time China's government has said it may alter its schedule for the exchange rate because of overseas interests. He didn't give a timetable.