Tibet's oldest woman, Arme Tsering, celebrated her 118th birthday on Monday at home in the northeastern suburbs of Lhasa, the Xinhua News Agency reported. In her best clothing -- a blue vest, green woolen sweater and a brand new Tibetan costume -- Tsering sat quietly under an umbrella in her courtyard to enjoy the sunshine as guests, mainly county and village officials and a few reporters, poured in. Everyone offered a hada, a white, Tibetan-style scarf, and wished her good health. When asked about Tsering's secret of longevity, her daughter Yangjen said it was just tea, minced beef and zanba, a Tibetan food made of fried barley flour.