Required.
Many communities in many places have explicitly asked for 14 days of active quarantine after returning from the field before they can go out and return to work, and there are also many places where the epidemic is not very well distributed, so there is no such mandatory requirement to quarantine after returning from a train ride.
But it's safer to isolate yourself for 14 days after getting off the train. This will prevent the virus from spreading again. If you accidentally come into contact with someone carrying the virus on the train, and you don't quarantine them after you get off the train, the virus will spread more and more, and the number of people infected with the virus will increase. If you feel unwell during the quarantine period, you can go to the hospital in time for treatment. The quarantine is a personal responsibility and a social responsibility.
Extended information:
Notes on isolation during an outbreak:
Observed persons must answer truthfully the health questions of the staff at the isolation observation point, cooperate positively with the temperature measurement and keep records.
Open windows for ventilation to allow direct exchange of indoor air with outdoor air, and avoid the use of air conditioners, especially central air conditioners.
All concerned should maintain sufficient rest, and food should be light and diversified to ensure adequate nutrition.
The paper towels, masks and household garbage used by users will be put into the garbage bins with lids at the White Door and handed over to the corresponding staff at Dolmen for disposal. Trash cans should be cleaned daily.
Users need to disinfect well in time, which can be done by wiping and cleaning with disinfectant.