The life of a Filipina domestic helper was featured in a documentary directed by a son of a well-known director in Hong Kong.

Justin Cheung, the eldest son of Alfred Cheung Kin-ting, and six other former film students made a documentary about domestic helpers in Hong Kong.

The film "Yaya" features the relationship between Cheung and his Auntie Tessie, a Filipina caretaker.

The film's Facebook page describes the documentary as an examination of Tessie's relationship with her employers and the family she left behind in the Philippines.

Cheung graduated from New York University, and has worked on different projects with his father.

He also funded the documentary through crowdsourcing.

In a post on the film's page, Cheung said spending time with his Auntie Tessie in the Philippines made him realize the importance of caretakers in the economy of Hong Kong.

"I will never look at her or the domestic helpers in Hong Kong the same way again. If you don't think they are the secret engine of the Hong Kong economy, they are definitely heroes to their families back home," he wrote.

Check out the trailer for "Yaya" here: