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A teacher welcomes students at Kyungbok High School in Seoul, South Korea, May 20, 2020.(Xinhua/Lee Sang-ho)
According to a phased school reopening plan of South Korea's Ministry of Education, high school seniors become the first batch to return school on Wednesday.
![](http://www.ecns.cn/hd/2020/05/20/d6413db8a3864174a3694a5fc1961c1d.jpg)
Seniors get temperature measured at Kyungbok High School in Seoul, South Korea, May 20, 2020.(Xinhua/Lee Sang-ho)
![](http://www.ecns.cn/hd/2020/05/20/4896cf3d302d41e98c7f61ed4cddc9b7.jpg)
Seniors get temperature measured at Kyungbok High School in Seoul, South Korea, May 20, 2020. (Xinhua/Lee Sang-ho)
![](http://www.ecns.cn/hd/2020/05/20/bc025bbe8afc47faa1b522de5e852b54.jpg)
Girls return to school for classes at Changduk Girls' High School in Seoul, South Korea, May 20, 2020.(Xinhua/Lee Sang-ho)
![](http://www.ecns.cn/hd/2020/05/20/3e79b72f468f4b1c8fb98dce944ac602.jpg)
A teacher welcomes students at Kyungbok High School in Seoul, South Korea, May 20, 2020.(Xinhua/Lee Sang-ho)