According to the passage, where do people still have to use a paper train ticket in China?

根据这篇文章，中国哪些地方人们仍需要使用纸质火车票？

youdao

He was so anxious to return home that he had booked a train ticket before the vacation began.

他回家心切， 还没放暑假就买好了火车票。

《新英汉大辞典》

I will buy a bullet train ticket.

我要买动车车票。

youdao

She is hoping to board a plane next Sunday. "If there are no flights, even until then, I will probably have to send my luggage by mail,and then try and get a train ticket going to Madrid and then maybe try and get back to Korea via New York or via Bangkok or Hong Kong.

VOA: standard.2010.04.19

A ticket to ride the train from Chicago to Seattle,Washington was fifty-one dollars and fifty cents.

VOA: special.2009.02.04

He went to the train station and bought a one way ticket for New York City.

VOA: special.2009.04.11

She had run away from home and was later spotted on security cameras buying a train ticket to New York City.

CNN: Heather Kelly,

User statistics for Dorking West suggest nearly everyone buys their train ticket from the town's two other stations, Dorking and Dorking Deepdene.

BBC: Airport rail station 'had only 14 passengers in year'

The teen had run away from home and was later spotted on security cameras buying a train ticket to New York City.

CNN: Heather Kelly,