During Jakarta-Bandung high-speed railway's joint commissioning and testing on Thursday, the train's running speed reached 350 kilometers per hour (km/h) for the first time, meeting the test run requirements. 

The incremental speed tests have been conducted since the start of joint commissioning and testing on May 22.

The comprehensive inspection train gradually increased its speed from 180 km/h to the design speed of 350 km/h, fully validating the functionality and performance of various systems of the railway, including track, power supply, overhead catenary system, communication, signaling, and early warning monitoring.

Since the end of February this year, personnel from China and Indonesia have closely collaborated in order to prepare for the official commencement of operation.

The Chinese side has provided professional training to Indonesian students in high-speed rail operation positions, including train drivers, train mechanics, and operation control center dispatchers to provide talent and technical support for the high-quality opening of the railway.

The high-speed line, a landmark project under the China-proposed Belt and Road Initiative, connects Indonesia's capital Jakarta and another major city Bandung. 

Spanning 142.3 kilometers, the railway makes Indonesia the first Southeast Asian nation to have a high-speed railway. 

It will cut the journey between Jakarta and Bandung from over three hours to around 40 minutes. 

(With input from Xinhua)