It is not free. Only children under 1 year old are free. Children under 1-6 years old (excluding) can buy tickets, and children over 6 years old (including) need to buy full tickets. Therefore, it is not free for Greater Bay Area No.1 to visit the Hong Kong-Zhuhai-Macao Bridge. The Hong Kong-Zhuhai-Macao Bridge is the longest sea-crossing bridge in the world today, which is known as the "eighth wonder of the world" and is the century project of China. It is a bridge and tunnel project connecting Hong Kong, Zhuhai, Guangdong and Macao, with a total length of 55 kilometers, including 29.6 kilometers of main bridge and 4 1.6 kilometers from Hong Kong to Zhuhai-Macao port. The bridge deck is a two-way six-lane expressway with a design speed of100 km/h.