Today, Cai's role has changed from a silent observer in life to a source of empowerment for his fellow hearing-impaired peers.

At his art studio LFORU, which is located on North Zhongshan Road in Shanghai, only hearing-impaired individuals can be found working behind the counter.

Besides floral and graphic designs, the studio also produces scented products, candles, leather and an assortment of other handicrafts. There is a monthly creative meeting where Cai instructs his staff to create specific designs. Every person here is free to create whatever he or she desires.

"I want my colleagues to do whatever they like. I believe this is how they can produce their best work," he says.

"Hearing-impaired people also have their advantages. They tend to be more focused and serious about matters," he adds.

"Sometimes, we're able to do things even better than others, but it takes a lot more effort for us because of this communication barrier."