Workers at the construction site of an oil refinery in Qinzhou, southwest China’s Guangxi Zhuang Autonomous Region, in this Nov. 13 photo. The Beibu Bay Economic Zone in Guangxi kept increasing momentum during the first half of 2008, with 17 percent growth in GDP and a 46 percent increase in fixed-assets investment. China approved guidelines regarding the development of the zone in January this year, making it a new spotlight of economic development as a China-ASEAN (Association of Southeast Asian Nations) base of economi cooperation.Xinhua