The dating has been indirectly questioned by Geoffrey Pope who argued that evidence does not support the appearance of hominidae in Asia prior to 1 million years ago. (this skepticism has since lifted, with additional findings in the last 25 years).
Procjenu starosti ovih fosilnih ostataka je neizravno doveo u pitanje Geoffrey Pope koji je objasnio da dokazi na raspolaganju ne podržavaju pojavu hominida u Aziji prije milijun godina od današnjice (ova je sumnja u međuvremenu razriješena s daljim otkrićima posljednjih 25 godina).