Here is an interesting article published by the BBC, regarding the longevity effects, stress reduction, and health benefits of Taiji:
“The ancient practice is immensely popular throughout China, but it is particularly beloved in Hong Kong for its ability to relieve stress and improve health. With famously small living spaces in Hong Kong, going to the city’s parks or tai chi gardens is a good way to be out in the open while getting some exercise. Hong Kong also has a rapidly ageing population – about one third of its population will be aged 65 or above by 2038 – and the city’s elderly citizens are encouraged by the government to attend classes in the morning, which are often followed by tea and dim sum with their teacher and classmates. Not only do tai chi classes promote healthy movement, but they provide the elderly with a social community and combat isolation.”
You can read the full article here: http://www.bbc.com/travel/story/20200428-asias-centuries-old-healing-technique