Dinh Thi Xa, 102, and her sister Dinh Thi Long, 94, in southeastern Vietnam have been recognized as the country's oldest female siblings alive, according to record keeper Vietkings.
Xa and Long have five other brothers and sisters, three of whom are still alive and all are over 90 years old.
Xa is the oldest and her next sister, whose name is not made available, is 98 years old.
Vietkings decided to grant the record to Long, the next younger sister, because the other one is living abroad, local media reported.
The two live in Dong Nai Province, east of Ho Chi Minh City.
The sisters said their longevity secrets include a balanced and moderate diet, as well as good care from their children and grandchildren. Members in their family also get along very well with one another, they said.
Earlier, Vietkings, which tracks and lists national records, had recognized several other longevity records.
The oldest woman in the country is Nguyen Thi Tru, 118.
Huynh Van Lac, 110, has been named the oldest man. He and his wife, Nguyen Thi Lanh, 106, are also the oldest couple alive.
Vietnam's oldest twin sisters are Vi Thi Cac and Vi Thi Dac, 100, from the northern province of Phu Tho.
These centenarians are all in sound health, capable of doing their daily activities on their own and helping others with little things, according to Vietkings.