"The Amur Leopard is the most critically endangered cat on our earth"
This is false. The Amur Leopard is the most critically endangered cat in the wild, but with a large captive population. The Iberian Lynx is the most criticaly endangered cat in the world, with the only ones in captivity in off-show breeding centres.
In point of fact, the most critically endangered cat in the world in terms of pure population numbers is the Iriomote Cat (Prionailurus bengalensis iriomotensis), which has been displaying a steady downward population trend, and at the last survey 5 years ago numbered no more than 109 individuals in the wild, with none in captivity.