Led by Liu Yuping, inheritor of traditional family tree record-book making, the Qinan County Clan Culture Research Center has compiled more than 250 family tree record-books for over 100 family names over the past 20 years. [Photo by Ding Yuanyuan/chinadaily.com.cn]

Liu Yuping (right) shows a gravestone rubbing used to compile a family tree record book. [Photo by Ding Yuanyuan/chinadaily.com.cn]