structural:expansion, quality:correction
Philanthropic causes

Teng began charity performances at a very young age. One of her first performances came on 17 August 1968, when she sang at the charity fair in Zhongshan Hall in Taipei, for the relief of the earthquake in the Philippines. The charity sale was donated on the spot. The following year, Teng was invited by the wife of the then- President of Singapore Yusof Ishak to a charity performance at the Singapore national opera house. That same year, Teng performed at the Ten-Star Charity Performance, held by the Singaporean authorities. In 1971, she became the youngest person ever to be awarded the title of the "Charity Queen" of Hong Kong's Bai Hua You Arts Auction for making charity sales. On 8 June 1973, Teng participated in the "Far East Top Ten Stars Charity Gala" in Singapore, gave four performances, and raised $400,000 to be used as scholarships for students in need. Teng continued performing for philanthropic causes throughout the 1970s in Singapore, Taiwan, and Hong Kong. In 1980, she raised over US$1 million for Yan Chai Hospital in Hong Kong and donated the proceeds of her show in Taiwan to that country's national trust fund. In January 1982, Teng held a concert at the Queen Elizabeth Stadium in Hong Kong, and the first proceeds were used for charitable donations; in August, she donated NT$160,000 to build a water tower in a village in northern Thailand and introduce a drinking water system. In 1985, Teng held a solo concert at the NHK Hall in Tokyo, Japan, proceeds of which were donated to charity. She made a special trip to Hong Kong in July 1991 to participate in the disaster relief program of ATV's "Love for East China" as a special charity performance guest to raise funds. Teng gave her last performance in 1994 in Taiwan, a year before her sudden and unexpected death.