Macao celebrates Spring Festival in 1999. [Photo by Hou Heliang/provided to chinadaily.com.cn]

Participants peform dragon dance. [Photo by Feng Daoyang/provided to chinadaily.com.cn]

Students take part in parade on the day when Macao returned to China in 1999. [Photo provided by The Photographic Society of Macao]

People from the mountainous area celebrate Macao's return in 1999. [Photo provided by The Photographic Society of Macao]

Police patrol at the tourist attraction Ruins of St. Paul's in Macao. [Photo by Deng Pufeng/provided to chinadaily.com.cn]

A light show is staged at the Ruins of St. Paul's Cathedral in Macao. [Photo by Huang Kunzhen/provided to chinadaily.com.cn]

A man makes egg tart, the most famous snack in Macao. [Photo by Wen Miaosen/provided to chinadaily.com.cn]

Zhuhai city and Macao, separated by a river, boom together. [Photo by Qiu Xiangquan/provided to chinadaily.com.cn]

The scenery of today's Zhuhai and Macao. [Photo by Zhu Zehui/provided to chinadaily.com.cn]

The scenery of Hong Kong-Zhuhai-Macao Bridge. [Photo by Xie Ruzhen/provided to chinadaily.com.cn]