The top-flight football league in England has been suspended indefinitely due to the rapid growth of the coronavirus pandemic with the people in charge agreeing that the competition will only be resumed once it is completely safe. He then travelled back to the United Kingdom, but has since returned home to South Korea a second time in late March.
The forward who has been out of action since February will have to go through an intense four-week military training program at a Marine Corps unit on the island of Jeju.
Son fractured his arm on February 16 in front of Aston Villa.
Son is now completing two weeks of self-quarantine after returning to South Korea last month with the Premier League suspended amid the coronavirus outbreak.
National service in the South Korea's military at some point between the ages of 18 and 35 is a mandatory requirement for all male citizens, although there can be special exceptions.
The 27-year-old, originally from the city of Chuncheon before moving to Seoul where his career began, is now quarantined after arriving from London as a result of the coronavirus crisis. With the league suspended, it was decided that it is an ideal time for Son to undergo the military service. Jose Mourinho Donates Food to Self-Isolating Elderly in London Amid Coronavirus Pandemic.
Son uploaded pictures and a video on Instagram last week, showing him skipping without a cast on his arm.
The 27-year-old Son had avoided military conscription in 2018 after winning the Asian Games with South Korea.
The enforced break has worked in his favour.