Extended Data Fig. 2: Distribution of livestock numbers in China on county scale in 2017.

All numbers are converted to pig units. 1 dairy cattle = 10 pigs; 1 beef cattle = 5 pigs; 3 sheep/goat = 1 pig; 15 layer chickens = 1 pig; 60 broiler chickens = 1 pig. Base map is applied without endorsement from GADM data (https://gadm.org/).