Son Heung-min's military training is said to include been exposed to tear gas.
The Tottenham star will also be involved in live-fire drills and a 30km loaded march during the three-week stint of intense training, according to a military official in his native South Korea.
Son, who earned an exemption by leading them to gold at the 2018 Asian Games, must still serve three weeks' worth of mandatory training.
The 27-year-old is set to begin the stint on April 20 at a Marine Corps unit in the southernmost island of Jeju, according to local media.
Son is currently in self-quarantine due to strict entry rules having travelled back to his home country from the UK.
A Marine Corps official said Son's military service would involve a shorter version of a boot camp which is undertaken by all new regular enlistees.
It would involve combat drills, discipline education and a chemical, biological, radiological and nuclear (CBRN) exercise.
A YouTube video posted by the Military Manpower Administration (MMA) shows the CBRN section of the training in a gas chamber.
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They are let out after a few minutes with tears on their faces and pouring water over their heads.
This article was most recently revised and updated 4 years ago
