Original sentence: Another advantage might be that if the different gauges have different loading gauges, the break-of-gauge helps keep the larger wagons clear of smaller tunnels.China has a standard gauge network; neighbouring countries Mongolia, Russia and Kazakhstan use 1520 mm and Vietnam uses metre gauge, so there are some breaks of gauge.Hong Kong's railway, the MTR, has 1,432 mm gauge for its original network, whereas its East Rail Line, West Rail Line and Ma On Shan Line use the standard gauge.Like Japan, the Republic of China use the 1,067 mm gauge for the majority of its railway network, but 1,435 mm standard gauge for high-speed rail; however, gauge differences are less of a problem as Taiwan High Speed Rail generally uses separate rolling stock and separate rights of way
Edited sentence: Another advantage might be that if the different gauges have different loading gauges, the break of gauge helps keep the larger wagons clear of smaller tunnels.Hong Kong's railway, the MTR, has 1,432 mm gauge for its own network, whereas its East Rail Line, West Rail Line and Ma On Shan Line use the standard gauge.Like Japan, the Republic of China use the 1,067 mm gauge for the majority of its railway network, but 1,435 mm standard gauge for high-speed rail; however, gauge differences are less of a problem as Taiwan High Speed Rail generally uses separate rolling stock and separate rights of way, and runs on different routes from the conventional railway network.The People's Republic of China has a standard gauge network; neighbouring countries Mongolia, Russia and Kazakhstan use 1520 mm and Vietnam uses metre gauge, so there are some breaks of gauge