JINAN, Dec. 26 (Xinhua) -- The Jinan-Qingdao high-speed railway, which was put into operation Wednesday, has introduced 4G service and is preparing for 5G service in the future, according to Jinan's railway sector.

The high-speed railway project has 604 base stations, two tunnels and 11 railway stations, with a total investment of 184 million yuan (about 26.7 million U.S. dollars).

The railway's five major stations have also introduced 4G service and prepared for 5G service in the future.

The Jinan-Qingdao high-speed railway is a vital part of China's railway network connecting Qingdao, a major coastal city in east China's Shandong Province, with Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region.