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BEIJING — The world's only surviving panda triplets have been successfully reunited with their mother.

The two boys and a girl are now 134 days old. They are walking and teething.

When NBC News visited the triplets on their two-month birthday at China's Chimelong Safari Park, their mother was only able to cope with one baby at a time and the triplets were rotated.

The others were raised by keepers.

For the last two weeks their mother has been caring for two of them at a time. Experts judged that she was able to take full parental control.

"We did a lot of preparation," Dong Guixin, the safari park's general manager, told NBC News on Tuesday.

But it was a tense moment when the family was fully united.

"Everybody was holding their breath at that moment," he said. "One of the three was very nervous and stayed at the gate. Mother Juxiao waited for a moment and then went to her baby. Then she hugged the baby like humans do, we felt so moved. Personally, I think is a success."

Mother giant panda Juxiao is seen with one of her triplets at Chimelong Safari Park in Guangzhou, China, on Tuesday,Reuters
- Ian Williams