China's entry into the World Trade Organization has brought the mainland annual gains of US$40bn and generated US$75bn in annual real incomes worldwide, says a World Bank study. Income distribution, however, is uneven in the mainland, the study found, with urban residents benefiting from most of the wealth as their rural counterparts fall further behind. China's manufacturing output for export grew significantly, led by apparel, textile and vehicle sectors, the study said. The primary beneficiaries of China's lowered import barriers were North America, Western Europe and Japan. Beverages, tobacco, textile and commercial services led the way.