File photo shows a tea garden on a mountain in Longjuan Township of Anxi County, east China's Fujian Province.the country's total number of GIAHS to 18.The sites were designated as GIAHS for their unique ways of using traditional practices and knowledge while maintaining unique biodiversity and ecosystems, according to the FAO. GIAHS, which is celebrating 20 years in October, is a flagship program of the FAO. FAO's worldwide agricultural heritage network now consists of 65 systems in 22 countries around the globe, the organization said. ■