Giant Pandas Kaikai and Xinxin from Mainland China Arrive in Macau

A new pair of giant pandas, given by China's central government as gifts to the Macau Special Administrative Region (SAR), arrives on April 30, 2015, amid warm welcome from the local people.

A pair of giant pandas gifted by China's central government to the Macau Special Administrative Region leaves the southeast Chinese city of Chengdu, Sichuan province, on April 30, 2015.

Experts are adjusting the panda cages on the plane before the flight sets out for Macau from the Chendu Shuangliu International Airport in southwest China's Sichuan Province on April 30, 2015.

Chen Fengxue (L), Deputy Director of the State Forestry Administration and CHAN Hoi Fan (R), Macau SAR Government Secretary for Administration, shake hands after signing the handover certificate on April 30, 2015, which means that the new pair of giant pa

The pair of giant pandas, named "Kaikai" and "Xinxin," leaves southeast China's Chengdu, Sichuan Province, on April 30, 2015, taking Air China flight CA 649 to Macau.

Local primary school students, teachers, and local officials from Macau wait for the new pair of pandas to arrive at the Macau International Airport on April 30, 2015.

Chinese President Xi Jinping said during a past visit to Macau that the central government would give the peninsula another two pandas after one of the pair given by the mainland government died in June 2014.

The pair of giant pandas, named "Kaikai" and "Xinxin," left southeast China's Chengdu, Sichuan Province, on April 30, 2015, taking Air China flight CA 649 to Macau.

A female panda, No. 667, and a male panda, No. 726, were chosen from 55 candidates in a three-month selection to replace the previous pair gifted to Macau in 2010. The previous pair is male panda, also named Kaikai, and his partner, Xinxin, who died on June 22, 2014.

The Chinese government regards giant pandas--known as big bear cats--as a national treasure. They are classified by the International Union for Conservation of Nature as "conservation-reliant endangered species."