Why doesn't the high-speed train have seat E? The reason is...

On August 1, 2008, the Beijing-Tianjin Intercity Railway was officially opened for operation, ushering in China's "high-speed rail era". This line is China's first high-standard high-speed railway with a designed speed of 350 kilometers per hour, and is also the first intercity passenger transportation system to be opened for operation in the "Medium and Long-Term Railway Network Plan".

Now, 15 years later, my country's high-speed railways have reached 94.9% of the country's cities with a population of more than 500,000, with an operating mileage of 42,000 kilometers, ranking first in the world.

So, how much do you know about high-speed rail? Do you know these 9 little facts about high-speed rail?