He was spotted at the airport wearing a ring in the shape of a safety pin. Fans were touched when they found out that the ring meant he was a regular donator to UNICEF. UNICEF Korea has a campaign where people who have a donation plan of every month to help children, will receive a ring.
Seeing Chanyeol with the ring has also inspired many EXO-Ls to join the campaign, donating what they can to give help to children in need.
You can learn more about the campaign here.