This may take place after their cub, Nuan Nuan, returns to China before the end of the year.
Its zoological and veterinary director Dr Mat Naim Ramli said it would all depend on the desire of the giant pandas to mate during their fertility period.
“Since the pair will only go through the mating process once a year, from April to May, we need to monitor their movements before placing them in one cage.
“If successful and their second cub is born, the cub will go through the same process as Nuan Nuan, which will be sent back to China after it turns two.”
He said this at the pair’s 11th birthday celebration at the Giant Panda Conservation Centre (GPCC) here today.
Present were Chinese ambassador to Malaysia Dr Huang Huikang, National Zoo president Zaharin Md Arif and its deputy president, Rosly @ Rahmat Ahmat Lana.
Mat Naim said the GPCC created history when a cub was born within a year after the arrival of the pair from Chengdu in 2014.
“Other giant pandas in other zoos and conservation centres outside China may take up to five years to give birth,” he said.
He said the centre was trying to train Nuan Nuan to adapt to the special cage in which she would be placed during her flight back to China. The efforts began last month.
Mat Naim said Xing Xing currently weighs 130kg while Liang Liang weighs 108kg and Nuan Nuan 78kg.
The pair of giant pandas are being loaned to Malaysia by China under an international conservation cooperation programme as part of efforts to strengthen bilateral relations.