This via Russian news agency TASS:

  • From the beginning of February, all foreigners in the DPRK were placed in strict quarantine until March 1, 2020 to prevent the spread of a new coronavirus.
  • It doesn't matter if a person has visited China in recent weeks or not.
  • The North Korean authorities proceed from the fact that employees of embassies accredited to the DPRK often travel to the Celestial Empire, in a small Pyongyang "foreign party" everyone intersects one way or another, which means that everyone has a danger of getting infected.

TASS citing Russian Ambassador to the DPRK Alexander Matsegora

Link (you may have to translate the text)