Photo taken on August 25, 2017 shows a view of the world's longest cross-sea bridge, the Hong Kong-Zhuhai-Macao Bridge, under construction against Hong Kong's Lantau Island in the background. (Photos: China Plus/IC)

Photo taken on August 25, 2017 shows a view of the world's longest cross-sea bridge, the Hong Kong-Zhuhai-Macao Bridge, under construction against Hong Kong's Lantau Island in the background. (Photo: IC)

A view of the world's longest cross-sea bridge, the Hong Kong-Zhuhai-Macao Bridge, in Zhuhai city, south China's Guangdong province, 6 September 2018.(Photo: IC)

The Hong Kong-Zhuhai-Macau Bridge is seen, in Zhuhai city, south China's Guangdong province, Wednesday, March 28, 2018. The Hong Kong-Zhuhai-Macau Bridge, the world's longest cross-sea project, which has a total length of 55 kilometers. The main section includes 23 kilometers of bridges, 6.7 kilometers of tunnels, and two artificial islands. (Photo: AP)

The departure hall of the Hong Kong-Zhuhai-Macau Bridge is seen during a press tour in Hong Kong Friday, Oct. 19, 2018. The bridge, the world's longest cross-sea project, which has a total length of 55 kilometers (34 miles), will have opening ceremony in Zhuhai on Oct. 23. (Photo: AP)

The departure hall of the Hong Kong-Zhuhai-Macau Bridge is seen during a press tour in Hong Kong Friday, Oct. 19, 2018. The bridge, the world's longest cross-sea project, which has a total length of 55 kilometers (34 miles), will have opening ceremony in Zhuhai on Oct. 23. (Photo: AP)

The Hong Kong-Zhuhai-Macau Bridge is seen in Hong Kong, Monday, Oct. 22, 2018. The bridge, the world's longest cross-sea project, which has a total length of 55 kilometers (34 miles), will have opening ceremony in Zhuhai on Oct. 23. (Photo: AP)

An aerial view taken on October 22, 2018, shows a section of the Hong Kong-Zhuhai-Macau Bridge (HKZM) in Hong Kong. The world's longest sea-bridge connecting Hong Kong, Macau and mainland China will be launched October 23, at a time when Beijing seeks to tighten its grip on its territories. (Photo: AFP)

The Hong Kong-Zhuhai-Macau Bridge is lit up in Hong Kong, Monday, Oct. 22, 2018. The bridge, the world's longest cross-sea project, which has a total length of 55 kilometers (34 miles), will have opening ceremony in Zhuhai on Oct. 23. (Photo: AP)

Photo taken on October 10, 2018 shows the bridge towers of the Hong Kong-Zhuhai-Macao Bridge in Guangdong Province. The world's longest sea bridge will be officially put into service on Wednesday, October 24, 2018. (Photo: China Plus)

Photo taken on October 10, 2018 shows the entrance of the undersea tunnel of the Hong Kong-Zhuhai-Macao Bridge. The world's longest sea bridge will be officially put into service on Wednesday, October 24, 2018. (Photo: China Plus)

A view inside the undersea tunnel of the Hong Kong-Zhuhai-Macao Bridge is seen in this photo taken on October 10, 2018. The tunnel is 6.7 kilometers long. (Photo: China Plus)

Photo taken on October 10, 2018 shows monitors at the administration office of the Hong Kong-Zhuhai-Macao Bridge. The world's longest sea bridge will be officially put into service on Wednesday, October 24, 2018. (Photo: China Plus)

Photo taken on October 11, 2018 shows the entrance of the Gongbei Tunnel in Zhuhai, Guangdong Province. The 2,741-meter-long two-way tunnel with six lanes in total connects the main body of the Hong Kong-Zhuhai-Macao Bridge with Zhuhai. (Photo: China Plus)

Photo taken on October 11, 2018 shows the Zhuhai border crossing for the Hong Kong-Zhuhai-Macao Bridge. The world's longest sea bridge will be officially put into service on Wednesday, October 24, 2018. (Photo: China Plus)

Photo taken on October 11, 2018 shows passages for freight vans at the Zhuhai border crossing for the Hong Kong-Zhuhai-Macao Bridge. Passenger coaches and freight vans can use a 'one-stop-shop' for entry-exit procedures at the border crossing. (Photo: China Plus)

Photo taken on October 11, 2018 shows cooperative self-service immigration inspection passages at Zhuhai-Macao border crossing of the Hong Kong-Zhuhai-Macao Bridge. A new 'cooperative inspection and once-and-for-all clearance' immigration inspection mode has been introduced to the border crossing so that passengers only need to queue once and receive inspection once, and can finish the immigration inspection procedures from both the Chinese mainland and Macao within 20 to 30 seconds. (Photo: China Plus)

A man displays the voucher he received after finishing immigration inspection procedures at Zhuhai-Macao border crossing of the Hong Kong-Zhuhai-Macao Bridge during a demonstration of how to use the cooperative self-service immigration inspection passages on October 11, 2018. (Photo: China Plus)

Photo taken on October 11, 2018 shows manned cooperative immigration inspection passages at Zhuhai-Macao border crossing of the Hong Kong-Zhuhai-Macao Bridge. In this kind of passages, passengers are checked at the entry point, while inspectors at the exit point perform monitoring duties from a management system. Inspectors in front of the barriers are from the Chinese mainland, and those behind the barriers are from Macao. (Photo: China Plus)

A view of the Zhuhai border crossing for the Hong Kong-Zhuhai-Macao Bridge is seen in this photo taken on October 11, 2018. The world's longest sea bridge will be officially put into service on Wednesday, October 24, 2018. (Photo: China Plus)