Long ton, also known as the imperial ton or weight ton, is the name for the unit called the  ton  in the avoirdupois or Imperial system of measurements standardised in the thirteenth century that is used in the United Kingdom and several other Commonwealth countries alongside the French metrication invented in 1799.
Animals of the bear family (including seven existing species of bears and one species of giant panda) usually have very low cub to mother weight ratio. This ratio of giant pandas is at the lowest 1:1,000 to 1:1,500. The newborn's weight only about 150g (0.33 pounds), which is approximately one thousandth of their mothers' weight. One month after birth, they will weigh 2kg (4.4 pounds), then reach 5-6kg two months later.
The giant panda is very huge and can measure to the size of an American bear. Each adult panda can weigh more than 500 pounds. A giant pandaâs actual lifespan is unknown to the scientists. In China, there are pandas that are 35 years old and bred in captivity. In the wild, the panda may survive up to 30 years or more. The chances of it surviving in the wild are less because of the loss of habitat and also predators like human beings and leopards.