The bridge, with a length of 55 kilometers, opened to traffic in November 2018.

Conducting tourism activities on the bridge marks a historic breakthrough nationwide, as the route is located among the Hong Kong, Zhuhai and Macao ports, and within the Customs supervision zone and designated areas, said Zheng Shunchao, director of the administration bureau of the bridge.

"The bridge tour offers unique experiences different from regular sightseeing, as visitors can appreciate the magnificence of a national engineering project and experience the wonder of the bridge's construction," Zheng said.

During the tour, visitors also have the chance to admire wild Chinese white dolphins, known as the "giant pandas of the sea", as the tour route passes by the world's largest habitat of these dolphins.

"Though tourism will give new vitality to Blue Dolphin Island, it will also present challenges requiring additional maintenance and safety work," Zheng said.

With the trial operation, the director said the bureau will improve support facilities and services to provide a better visiting experience.

"We will enhance the role of the bridge as a new channel for economic and trade exchanges between Zhuhai, Hong Kong and Macao to facilitate the free flow of people, goods, capital, and innovation within the Guangdong-Hong Kong-Macao Greater Bay Area," said Huang Zhihao, the mayor of Zhuhai.