VOICED : Walk this way says Chinas heavy

Mr. Jung, a 52-year-old factory owner, is known for lifting iron shoes weighing over 400 kilograms. He attributes his strength to Qigong, an ancient Chinese practice. Jung walks 15 meters daily in these shoes, claiming health benefits and aspiring for a Guinness record. His neighbors have adopted the practice, and he produces the shoes for $90 a pair. Jung aims to share his secret globally, while the shoes' weight deters theft.

What health benefits does Zheng believe come from wearing iron shoes?

What is Mr. Jung's goal regarding his iron shoes and customers?