CHINA has finished its campaign to clamp down on unauthorised development zones, or free-trade zones, allowing only 470 to retain their status. Before the clampdown, various local governments in the country set up more than 2,000 development zones to tap foreign funds. With a total area of 9,558 square kilometres, the proliferation of the zones resulted in a drastic drop in farm land and poor co-ordination in the planning of projects. The Chinese Government announced at a weekend conference in Tianjin that it was ending the nationwide campaign to sort out development zones. Only 470 such zones with a total area of 3,238 sq km now remain. About 130 development zones had earlier been approved by Beijing, bringing the total to 600.