Blue Ocean expressway is the national highway from Lanzhou to Haikou. G75 for short.

Blue Ocean passes through Lanzhou-Longnan-Guangyuan-Nanchong-Vu Thang-Chongqing-Qijiang-Zunyi-Guiyang-Duyun-Hechi-Nanning-Qinzhou-Beihai-Zhanjiang-Haikou, with a total length of 2,570 kilometers.

The planned route consists of Lanzhou-Guangyuan section of Hangzhou-Lanzhou line, Guangyuan-Chongqing section of Ningbo-Zhangmu line, Chongqing-Zhanjiang section of Yuzhan line, and Zhanjiang-Haikou section of the same third line.

Traffic conditions:

1, Lintao County in Gansu Province is not connected with Longnan City.

2. Because the Qiongzhou Strait Cross-sea Bridge has not been completed, the section from xuwen county to Haikou has not been connected, and the Qiongzhou Strait Cross-sea Bridge is still under planning.

Except for the above two paragraphs, the rest are all open to traffic.