Macao residents say the city has become more prosperous since it returned to the motherland 15 years ago.

Ng Kit Leng, a 21-year-old student at the University of Macao majoring in global business, introduces the historical sites and culture of Macao to residents and tourists.

"Since Macao returned to the mainland, its economy has been developing rapidly," Ng said. "The connection between Macao and the Chinese mainland is closer than before. Macao students have more opportunities to come to the mainland for exchanges, and we can even communicate with mainland organizations."