China's Ambassador to South Korea Qiu Guohong attends a memorial service at Incheon airport in South Korea. Photos provided to China Daily and Wang Tian / For China Daily

The cemetery in Shenyang, built in 1952, was expanded in 2014 to house the returned remains. A stone wall carved with the names of about 210,000 Chinese soldiers who died in the war was erected, and the cemetery now receives more than 150,000 visitors a year.

In 2014 and 2015, South Korea returned the remains of 505 Chinese soldiers.

In 2000, South Korea started to recover the remains of Chinese soldiers who died in the Korean War.

A special unit was established by the country's army in 2003 to handle recovery work.

According to South Korean media, most of the Chinese soldiers' remains discovered to date have been found in Gangwon-do and Gyeonggi-do provinces.