If the existence of a plough of some kind is questioned, some distinction must still be made between the tools interpreted as ploughshares and other implements, smaller and more roughly shaped, which have all the appearance of hoes. This ample evidence for agriculture in the Hung-shan neolithic of Manchuria is supplemented by the bones of cattle, sheep, pig and horse, excavated at Hung-shan itself, which attest the advanced animal farming which the geographical environment so clearly favoured.