The sites in China are located in Liu Jia (28140N, 116550E; Jiangxi Province) and Sun Jia (28130N,116530E; Jiangxi Province), both have been used for flooded rice-rice rotation for more than 100 years, and Jinjiaba (31050N,120460E; JiangsuProvince) which was under rape-rice rotation for at least 20 years.