Traveler irritated by security problems

Liu Jinwei has been using Beijing South since it opened in 2008.

"I was in college then and I tried it out soon after it became operational. Taking bullet trains was not common back then and you didn't see many passengers in the huge station," said the 29-year-old, who works in Beijing as an insurance agent.

In 2015, Liu needed to go to Tianjin every week for work and had to use Beijing South to get there.