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

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