A building of Hong Kong-Zhuhai-Macau bridge Zhuhai port is seen after its opening ceremony in Zhuhai, China October 23, 2018.

A general view of the Hong Kong-Zhuhai-Macau bridge is seen before its opening ceremony on October 23, in Zhuhai, China October 22, 2018.

A sunset view of the Hong Kong-Zhuhai-Macau bridge off Lantau island in Hong Kong, China October 21, 2018, before its opening ceremony on October 23.

A man takes a selfie in front of the Hong Kong-Zhuhai-Macau bridge, before its opening ceremony on October 23, in Zhuhai, China October 22, 2018.

A policeman and his dog patrol a building of Hong Kong-Zhuhai-Macau bridge Zhuhai port ahead of its opening ceremony in Zhuhai, China October 23, 2018.

A general view of the Hong Kong-Zhuhai-Macau bridge is seen from a rooftop pool before its opening ceremony on October 23, in Zhuhai, China.

Chinese President Xi Jinping attends the opening ceremony for the Hong Kong-Zhuhai-Macau bridge in Zhuhai, Guangdong province, China October 23, 2018.

A general view of the Hong Kong-Zhuhai-Macau bridge after its opening ceremony in Zhuhai, China October 23, 2018. REUTERS/Aly Song

An evening view of the Hong Kong-Zhuhai-Macau bridge showing the entrance to a cross sea tunnel from Zhuhai side, off Lantau island in Hong Kong, China October 21, 2018, before its opening ceremony on October 23, 2018.