All longer tunnels on China-Laos line holed through

All of the 15 tunnels that extend longer than ten kilometers on the Yunnan section of China-Laos railway have been holed through as of May 6, when the 11.6km Manmushu tunnel was drilled through.

In drilling the Manmushu tunnel, located in south Yunnan’s Mengla County, construction workers tackled complicated geological conditions, such as the deformation of soft rocks and noxious gas.

The Chinese section of the China-Laos railway involved a total of 93 tunnels and multiple bridges, and 92 of them are said to have been holed trough.

Source: Yunnan Daily; Trans-editing by Wang Shixue