ABOUT a quarter of the offices at the 330,000-square-foot T. P. Plaza in Guangzhou have been let since September, according to its leasing agents. The mixed residential/commercial development, located on Liuhua Road in the commercial centre of of the city, is alongside the China Export Commodities Fair and government institutions such as the Provincial People's Government Building. The offices are located on the fourth to 12th floors, while serviced apartments occupy the top two floors of the 14-storey building, which is being constructed by T. P. Holdings (HK) Development. An entertainment and shopping centre covers the first to third floors. Grade A office space was available at $22 per square foot, Colliers Jardine, T. P. Plaza's leasing agents, said.