The South's President Park Geun-Hye offered as a goodwill gesture to return the bodies during her visit to Beijing in June.
The defence ministry said it would send back the remains of 425 Chinese soldiers buried in a military-controlled cemetery in Paju just south of the border with North Korea.
"Work began today to excavate the remains under an agreement reached between the two countries in early December," a ministry spokesman told AFP.
The excavation will take several months, he said, adding South Korea would take charge of all preparations such as washing the remains and placing them in coffins.
The defence ministry described the agreement as "a new milestone" for relations between the former Cold War enemies.
China fought alongside North Korea in the 1950-53 conflict. Casualty figures remain disputed but Western estimates commonly cite a figure of 400,000 Chinese deaths, while Chinese sources mention a toll of about 180,000.
More than 700 North Korean soldiers are also interred at the cemetery. But the North has ignored the South's offer to return the bodies despite sporadic talks on the issue.
While some graves are named, most are identified only by nationality.
The bodies of more than two dozen North Korean commandos killed in a daring but unsuccessful 1968 attack on the presidential palace in Seoul are also buried there.
Also there is the body of a North Korean agent responsible for the 1987 bombing of a South Korean airliner that killed 115 people.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
