Refer:
- how-to-book-travel-high-speed-train-china-shanghai-beijing-shenzhen: https://www.theguardian.com/travel/2018/feb/16/how-to-book-travel-high-speed-train-china-shanghai-beijing-shenzhen
- High-speed rail in China: https://en.wikipedia.org/wiki/High-speed_rail_in_China
- How to take the train in China: https://www.seat61.com/China.htm
- how to board train: https://www.chinahighlights.com/travelguide/transportation/how-to-board-train.htm
- before get around the train: https://www.chinahighlights.com/travelguide/transportation/before-riding-train.htm
- how to travel by train in china: https://www.tripadvisor.com/Travel-g294211-c148494/China:How.To.Travel.By.Train.In.China.html
- how to take train in china: https://www.topchinatravel.com/customer-center/how-to-board-train-in-china.htm
- China train: https://www.travelchinacheaper.com/china-trains
- Train In China: https://www.lonelyplanet.com/china/transport/getting-around/train