BEIJING — China on Wednesday opened the world’s longest high-speed rail line that more than halves the time required to travel from the country’s capital in the north to Guangzhou, an economic hub in southern China.

The opening of the 2,298 kilometer (1,428 mile)-line was commemorated by the 9 a.m. departure of a train from Beijing for Guangzhou. Another train left Guangzhou for Beijing an hour later.

On Wednesday, China opened the world’s longest high-speed rail line that more than halves the time required to travel from the country’s capital in the north to Guangzhou, an economic hub in southern China.

China has opened the world’s longest high-speed rail line, which runs 1,428 miles from Beijing to Guangzhou.

China has massive resources and considerable prestige invested in its showcase high-speed railways program.

But it has in recent months faced high-profile problems: part of a line collapsed in central China after heavy rains in March, while a bullet train crash in the summer of 2011 killed 40 people. The former railway minister, who spearheaded the bullet train’s construction, and the ministry’s chief engineer, were detained in an unrelated corruption investigation months before the crash.

Trains on the latest high-speed line will initially run at 300 kph (186 […]