NTUC secretary-general Ng Chee Meng (centre) observing Ella, a robot that vacuums carpeted areas and greets guests in hotel environments, at the Copthorne King's Hotel yesterday.
Caption: 
NTUC secretary-general Ng Chee Meng (centre) observing Ella, a robot that vacuums carpeted areas and greets guests in hotel environments, at the Copthorne King's Hotel yesterday.