Individual itineraries and the circulation of scientific and technical knowledge in East Asia (16th–20th centuries)

In order to thank for Xie who has saved a lot of persons during the epidemic, the gentlements of Qingyuan give him a couplet written in golden colour which reads: Fang shu long gong xiao shi jie; xue tong jin gui dai tian gong 方述龍宮消世劫，學同金匱代天工