On may 30, the singer made a handwritten letter and posted it into the official fan site. Afterwards, his enlistment to military is announced.

EXO-L's, be strong. I know that it's been a week since the eldest leave and we didn't get over still.
Please be healthy and strong and continue to support and show more love to them (Xiumin and D.o) and especially to EXO.
Especially that they have a lot of upcoming activities today without the presence of the two.
Let's love more EXO. Let's support more EXO.

And to you, our beloved D.o, please take care of yourself there. Eat a lot and be healthy and strong.
We will wait for you and Xiumin until you will comeback in the year 2021. You will do it. All the best. 짱~

Let's go together~We are one. 사랑하자!

God Bless you as you will take your duty as a man of the country.
#WeAreOne #DoKyungSoo #MilitaryTrainingService #Enlistment #L_1485