India, March 19 -- A Taiwanese singer has sparked online debate after demonstrating a "vacuum belly" exercise during a live concert in China, reports the South China Morning Post (SCMP). The technique, widely circulated on social media, is believed by some to help flatten the stomach.

Singer Ella Chen Jiahua performed the move during her show in Xi'an on March 7. In viral clips, the 44-year-old can be seen pulling her stomach inward while holding her breath, making her ribs visibly prominent. Before demonstrating the technique, she asked the audience to watch closely. (Also read: Gurugram surgeon shares hidden risks of rapid weight loss with Mounjaro: 'Faces start looking older than expected.' )

"I want to show you a stunt. Watch me clo...