The origin of this transformation lies in the lost-wax casting method, a thousand-year-old technique.
In the 1980s, Yang and Chang, both from Taiwan, were major figures in Chinese-language cinema. Yang won the Golden Horse Award for Best Actress twice, while Chang took home the Golden Horse for Best Director.
In 1987, at the height of their careers, the two made a resolute decision to leave filmmaking behind and devote themselves to glass art.
"After 12 years and more than 120 films, a question lingered at the back of our minds: would any of this effort endure?" she says.
That question became the starting point for their journey into glass.